NCERT-Based 1000 MCQ for DSSSB TGT Natural Science PDF

NCERT Based 1000 MCQ for DSSSB TGT Natural Science Biology Q7. The basic unit of all living organisms is (a) A drop of blood Q1. In human body, the cell growth and differentiation...

NCERT Based 1000 MCQ for DSSSB TGT Natural Science Biology Q7. The basic unit of all living organisms is (a) A drop of blood Q1. In human body, the cell growth and differentiation (b) A molecule of glucose are highly controlled and regulated, but in cancer cells. (a) there is breakdown of these regulatory mechanism (c) A set of proteins leading to formation of benign and malignant tumors (d) A cell (b) controlled cell division and over production of Ans: (d) genetic material occur Q8. Which of the following is the basic characteristic of a (c) RNA is mutated and produced in less amount living organism? (d) DNA is mutated and produced in less amount Ans: (a) (a) Ability to move (b) Ability to reproduce Q2. A ‘clinical death' takes place when (c) Ability to eat (a) There is no pulse (d) Ability to breathe (b) There is no heart beat Ans: (b) (c) Pupils are fixed and dilated, and there is no reaction to light Q9. Which of the following branches of science is (d) All the above three conditions are present together concerned with the study of the relationship of plants to Ans: (d) their environment? Q3. Man has become the dominant species in the (a) Cytology biosphere because of his (b) Ecology (a) Tool-making capacity (c) Morphology (b) Ingenious brainpower (d) Physiology (c) Articulated speech and language Ans: (b) (d) All the above mentioned qualities Ans: (d) Q10. Bacteria do not need sunlight to grow because Q4. Movements due to light are shown by (a) They lack chlorophyll and so they are incapable of (a) Flowering plants making their own food (b) Lower plants (b) They hate sunlight (c) All land plants (c) They use other kinds of light for their food synthesis (d) All the plants (d) They prepare their food without the help of sunlight Ans: (a) Ans: (d) Q5. The main difference between the living and nonliving is (a) in the growth (b) in the size (c) in the movement (d) in the presence of protoplasm Ans: (d) Q6. Which is regarded as a link between the living and the non-living? (a) Amoeba (b) Virus (c) Bacteria (d) RNA Ans: (b) 1 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q11. Most viruses that infect plant possess Q19. Man belongs to the phylum (a) single-stranded DNA (a) Mollusca (b) single-stranded RNA (b) Chordata (c) double-stranded DNA and RNA (c) Porifera (d) double - stranded RNA only (d) Amphibian Ans: (b) Ans: (b) Q12. A cockroach has Q20. Outer covering of virus made up of protein is (a) Three pairs of walking legs (a) Capsid (b) Two pairs of walking legs (b) Coat (c) Four pairs of walking legs (c) Virion (d) One pair of walking legs (d) Viroid Ans: (a) Ans: (a) Q13. All the following are invertebrates except Q21. Snakes and lizards are animals that are (a) Snail (a) Warm-blooded (b) Crab (b) Cold-blooded (c) Prawn (c) Both (d) Fish (d) None of these Ans: (d) Ans: (b) Q14. Bacteria reproduce Q22. The virus that infects a bacterium is (a) By sexual method only (a) Arbovirus (b) By asexual method only (b) Viremia (c) Mostly by sexual method (c) Bacteriophage (d) Mostly by asexual method (d) Baclofen Ans: (d) Ans: (c) Q15. Crows and pigeons are Q23. Which of the following is a parasitic plant? (a) Warm-blooded (a) Marchantia (b) Cold-blooded (b) Kelp (c) Neither (a) nor (b) (c) Mushroom (d) Both (a) and (b) (d) Pteris Ans: (a) Ans: (c) Q16. Fungi are always Q24. Which of the following is an amphibian? (a) Autotrophic (a) Whale (b) Heterotrophic (b) Turtle (c) Parasitic (c) Frog (d) Saprophytic (d) Cow Ans: (b) Ans: (c) Q17. Lichen is considered to be a symbiotic association Q25. Which of the following is not a mammal? of two living organisms. Which organisms are involved (a) Fish in it? (b) Cow (a) Algae and bacteria (c) Goat (b) Algae and fungi (d) Whale (c) Algae and bryophytes Ans: (a) (d) Fungi and bryophytes Q26. Algae often float on surface of water during the day Ans: (b) but sink down during the night due to Q18. Mammals are (a) Evolution and trapping of oxygen bubbles during the (a) Warm-blooded day in their photosynthesis (b) Becoming light as they consume most of their food in (b) Cold-blooded the night (c) Both (a) and (b) (c) Warming action of sun during the day (d) None of these (d) Release of absorbed air by warming of water Ans: (a) Ans: (a) 2 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q27. Aves are Q35. A cell cycle consists of (a) Cold-blooded (a) Mitosis and meiosis (b) Warm-blooded (b) GI, the Sphase, and G2 (c) Both (c) Prophase, metaphase, anaphase and telophase (d) None of these (d) Interphase and mitosis Ans: (b) Ans: (d) Q28. Bacteria and fungi developing on dead decaying Q36. Gene is organisms are (a) A segment of DNA or functional RNA (a) Parasites (b) A segment of DNA and histone (b) Commensals (c) A segment of DNA, RNA and histone (c) Saprophytes (d) All of the above (d) Symbionts Ans: (a) Ans: (c) Q37. Genes control Q29. Bacteria can live in cold climate for (a) Protein synthesis but not heredity (a) Few years (b) Protein synthesis and heredity (b) 1,000 years (c) Heredity but not protein synthesis (c) 2,000 years (d) Biochemical reaction of some enzymes (d) Many years Ans: (b) Ans: (d) Q38. Genetics is the branch of science that deals with the Q30. Bacteria having flagella all over the body are called study of (a) Lophotrichous (a) Relations between plants and the environment (b) Monotrichous (b) Inheritance and variation (c) Peritrichous (c) Cell structure (d) Morphotrichous (d) Thermal structures Ans: (c) Ans: (b) Q31. Inflorescence is Q39. The human cell contains (a) Group of flowers (a) 44 chromosomes (b) Occurrence of flowers (b) 48 chromosomes (c) Arrangement of flowers (c) 46 chromosomes (d) Arrangement of flowers on the floral axis (d) 23 chromosomes Ans: (d) Ans: (c) Q32. Insects belong to the phylum Q40. The power house of energy in cells is (a) Annelida (a) Golgi bodies (b) Arthropoda (b) Mitochondria (c) Crustaceans (c) Ribosomes (d) Coelenterate (d) Endoplasmic reticulum Ans: (b) Ans: (b) Q33. Of the following taxonomic categories which is the Q41. The process of cell division can take place by most inclusive (i.e., is the highest in hierarchy)? (a) Heterosis (a) Order (b) Fusion (b) Subspecies (c) Mitosis (c) Class (d) None of these (d) Genus Ans: (c) Ans: (c) Q42. The process of the division of somatic cells of an Q34. Our major foods, fibres, spices, fruits and beverage organism is called crops are (a) Mitosis (a) Flowering plants (b) Meiosis (b) Gymnospermous plants (c) Cytokinesis (c) Pteridophytes (d) None of these (d) Bryophytes Ans: (a) Ans: (a) 3 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q43. A plant cell is distinguished from an animal cell by Q50. A high surface area to volume ratio in cells is the presence of important because it (a) Nucleus (a) Enables efficient transfer of wastes, nutrients and (b) Chloroplasts gases across the cell membrane (c) Cell membrane (b) Prevents overproduction of cell proteins due to (d) Mitochondria structural limitations Ans: (b) (c) Allows many antigens on the surface for Q44. Every multicellular organism, be it a microscopic identification of self and non-self alga, a banyan tree or a human being, starts as a single (d) Provides for better structural support to cope with cell called a/an external physical pressure (a) Egg Ans: (a) (b) Sperm Q51. Broad spectrum antibiotics are one which attack (c) Nucleus (a) Pathogens as well as host (d) Gene (b) A wide range of pathogens Ans: (a) (c) Only pathogens Q45. HCI is secreted by (d) Only host (a) Zymogen cells Ans: (b) (b) Peptic cell Q52. The fluid medium of the nucleus is called (c) Oxyntic cells (a) Chromosomes (d) None of these (b) Nucleolus Ans: (c) (c) Nucleoplasm Q46. In which of the following will you look for E. Coli? (d) Chromatin (a) Milk Ans: (c) (b) Water Q53. The substance that makes up about 80% of (c) Human intestine cytoplasm (d) Soil (a) Minerals Ans: (c) (b) Water Q47. Just as the division of cytoplasm is called (c) Protein cytokinesis, the division of nucleus is called (d) Fats (a) Heterosis Ans: (b) (b) Mitosis Q54. The type of relationship in which one organism is (c) Meiosis benefited while there is no effect on other is (d) Karyokinesis (a) Symbiosis Ans: (d) (b) Commensalisms Q48. The basic structure of cell membranes (c) Mutualism (a) Is a lipid bilayer that serves as a barrier to water (d) Parasitism soluble molecules Ans: (b) (b) Differs ultra structurally for internal and external membranes of cell (c) Is best described as lipids dispersed within a protein bilayer (d) Is visualised as bilaminar structure with transmission electron microscopy Ans: (a) Q49. The organelle that make ATP is (a) Microbody (b) Nucleus (c) Mitochondrion (d) Ribosome Ans: (c) 4 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q55. Under the electron microscope, you observe a cell Q61. Cell recognition and adhesion occur due to with three different types of large organelles, each biochemicals of cell membrane named bounded by two membranes. The cell is most likely (a) Proteins (a) A plant (b) Lipids (b) An animal (c) Proteins and lipids (c) A fungus (d) Glycoproteins and glycolipids (d) A bacterium Ans: (d) Ans: (a) Q62. Cell wall of chloroplast is removed, the remaining Q56. Polynucleotide chain of DNA contains is called (a) a nitrogenous base, deoxyribose sugar and phosphate (a) Etioplast group (b) Aleuroplast (b) a nitrogenous base, ribose sugar and phosphate (c) Amyloplast group (d) Protoplast Ans: (d) (c) deoxyribose sugar ribose sugar and phosphate group (d) a nitrogenous base and phosphate group only Q63. Endocytosis is a process whereby a cell Ans: (a) (a) Digests itself (b) Engulfs and internalises material using its membrane Q57. Neurospora is used as genetic material because (c) Identifies other cells within its immediate (a) It has short life cycle of 10 days (d) Enables the extracellular digestion of large molecules (b) The product of single meiosis can be easily analysed Ans: (b) (c) Meiotic products are linearly arranged in the form of ordered tetrads Q64. Following are the characteristic of genetic code (d) Is a diploid fungus (a) It is triplet Ans: (a) (b) It is universal (c) It is non-overlapping Q58. AIDS is caused by the Human Immunodeficiency (d) It is ambiguous Virus (HIV) The transmission of HIV infection generally Ans: (a) occurs through. (a) eating contaminated food and water Q65. In meiosis the daughter cells are not similar to that (b) transfusion of contaminated blood and blood of parent because of products (a) Crossing over (c) inhaling polluted air (b) Synapsis (d) shaking hand with infected person (c) Both (a) and (b) (d) None of these Ans: (b) Ans: (a) Q59. The offspring from a cross between two individuals Q66. The only molecule in the living world that can differing in at least one set of characters is called a replicate itself is (a) Polyploid (a) DNA (b) Hybrid (b) RNA (c) Mutant (c) Both DNA and RNA (d) Variant (d) Neither DNA nor RNA Ans: (b) Ans: (a) Q60. The process of copying genetic information from Q67. The RNA molecules from a single strand of one strand of DNA in to RNA is termed as ribonucleotides of (a) translation (a) Adenine, guanine, cytosins and uracil (b) transcription (b) Adenine, guanine and cytosins (c) replication (c) Adenine and guanine (d) mutation (d) None of the above Ans: (b) Ans: (a) 5 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q68. The role of transfer RNS (IRNA) is to Q75. Cleavage divisions differ from normal mitotic (a) Transfer mRNA from the nucleus to the cytoplasm divisions in that: (b) Carry amino acids from the cytoplasm to the nucleus (a) There is no nuclear division during cleavage (c) Carry the newly synthesised protein to its site of (b) There is no division of cytoplasm during cleavage function in the cell (c) The division of cytoplasm follows nuclear division (d) Transport amino acids to ribosomes (d) There is no period of growth in between divisions Ans: (d) Ans: (d) Q69. The two strands of the DNA double helix are held Q76. DNA molecules are composed of together by deoxyribonucleotides of (a) Hydrogen bonds (b)C=C double bonds (a) Adenine and guanine (c) Hydrophobic bonds (b) Adenine, guanine and cytosine (d) Peptide bonds (c) Adenine, guanine, cytosine and thymine Ans: (a) (d) None of the above Ans: (c) Q70. What is the most likely explanation for the observation that two individuals originating from the Q77. DNA nucleotides are attached by same clone look different? (a) Hydrogen bonds (a) They developed in different environments (b) Covalent bonds (b) They are differentially adapted to the same (c) VANDER Wall's force environment (d) Electrovalent bonds (c) The clone from which they originated had more than Ans: (b) one genotype (d) They differ in heterozygosity Q78. DNA replication means Ans: (a) (a) DNA → DNA (b) DNA → RNA Q71. When white -flowered plant were crossed with (c) Autocatalytic function of DNA pure red - flowered plants, the progeny were - (a) White flowered (d) Heterocatalytic function of DNA (b) Red flowered Ans: (a) (c) Exhibiting 3:1 ratio of red to whiteflowered plants Q79. How many different kinds of amino acids are (d) Exhibiting 1:1 ratio of red to whiteflowered plants specified by the genetic code? Ans: (b) (a) 15 Q72. Which organelle does assemble ribosomes? (b) 20 (a) Nuclear envelope (c) 12 (b) Nucleolus (d) 200 (c) Chromosomes Ans: (b) (d) Nucleoplasm Ans: (b) Q80. A ligament is (a) A fibrous tissue that joins the muscle to bone Q73. Which statement is true of rRNA? (b) A type of amorphous gel that cements non movable (a) Called soluble RNA joints together (b) Named by Jacob and Monod (c) A type of fibrous connective tissue that joins bones (c) The smallest molecule of RNA (d) They form 80% of the total RNA together at joints Ans: (d) (d) Only formed to repair damaged muscle tissue Ans: (c) Q74. Which of the following is not a correct combination? Q81. A pl ant leaf appears to be green because it (a) Prophase, metaphase, anaphase, telophase (a) Absorbs green light (b) Leptonema, zygonema, pachynema, diplonema (b) Reflects all but yellow and blue light (c) Diplonema, anaphase I, telophase I, mitosis (c) Reflects green light (d) Prophase II, metaphase II, anaphase II, telophase II (d) Absorbs red and yellow light Ans: (c) Ans: (c) 6 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q82. Which tissue is responsible for the passage of water Q89. Maize grain is in plants? (a) A seed (a) Sclerenchyma (b) An embryo (b) Xylem (c) An ovule (c) Phloem (d) A fruit Ans: (d) (d) Collenchynatous cells Ans: (b) Q90. The odd one among the following is (a) Monocytes Q83. Delicious chilgoza seeds, commercially important (b) Lymphocyte products such as turpentine and resin and the drug (c) Neutrophils ephedrine, useful in asthma and other respiratory (d) Erythrocytes ailments, are all obtained from plants that are Ans: (d) (a) Ferns Q91. Phloem is a tissue found in (b) Algae (a) Reproductive organs of animals (c) Monocotyledons and dicotyledons (b) Plants (d) Gymnosperms (c) Insects Ans: (d) (d) Mammals Q84. Edible part of cauliflower is - Ans: (b) (a) Bud Q92. Potato is a modified form of (b) Inflorescence (a) Root (c) Flower (b) Stem (d) Fruit (c) Fruit Ans: (b) (d) Leaf Ans: (b) Q85. Edible part of mango and coconut is Q93. Scarification of seeds is done for removing (a) Mesocarp, endocarp (a) Dormancy (b) Endocarp and mesocarp (b) Germination inhibitors (c) Mesocarp and pericarp (c) Growth (d) Style and stigma (d) Embryo Ans: (a) Ans: (a) Q86. From which part of the plant is turmeric obtained? Q94. The smallest flowering plant is (a) Root (a) Amorphophallus (b) Fruit (b) Azadaachta indica (c) Seed (c) Erecta indica (d) Stem (d) Wolffia arrhiza Ans: (d) Ans: (d) Q87. Fruiting body of mushrooms is present in Q95. What is tissue culture? (a) Preparation of fragments of cell of an organism for (a) Fungi biochemical examination (b) Algae (b) Storage of human tissue for transplantation (c) Like monocotyledon seeds (c) A special type of skin grafting to treat burn cases (d) Like dicotyledon seed (d) None of the above Ans: (a) Ans: (a) Q88. Ginger and sweet potato are Q96. When we eat cauliflower we consume (a) Homologous (a) Leaf (b) Stem and roots respectively (b) Stem (c) Analogous (c) Flower (d) Both (b) and (c) (d) Inflorescence Ans: (d) Ans: (d) 7 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q97. Which of the following are mostly woody trees, Q105. A balanced diet contains always perennials and never herbs or annuals? (a) Animal protein (a) Angiosperms (b) Macro and micronutrients (b) Gymnosperms (c) Food nutrients for growth and maintenance (c) Pteridophytes (d) Butter and ghee (d) Bryophytes Ans: (c) Ans: (b) Q98. A dicot root shows Q106. A food chain consists of a (a) Large pith (a) Producer only (b) Reduced or no pith (b) Consumer only (c) Endarch xylem (c) Producer and a consumer (d) Conjoint bundles (d) Decomposer only Ans: (b) Ans: (c) Q99. Adventitious roots develop from Q107. A healthy freshwater fish is placed in saltwater. (a) Epidermis The expected consequence of this would be that (b) Pericycle or interfascicular parenchyma (a) The fish becomes dehydrated and dies (c) Cortex (b) The fish becomes bloated and dies (d) Endodermis (c) The fish suffers from a fungal or bacterial disease and Ans: (b) dies Q100. Dicot root having more than six vascular bundles (d) There is no observable effect on the fish provided is there is sufficient food (a) Pea Ans: (a) (b) Sunflower (c) Ficus Q108. Manufacturing food by the process of (d) Ranunculus photosynthesis in plants is an example of Ans: (a) (a) Anabolism Q101. Endodermis occurs in (b) Catabolism (a) Stems only (c) Both anabolism and catabolism (b) Roots only (d) Neither anabolism nor catabolism (c) Dicot stems and all types of roots Ans: (a) (d) Both monocot and dicot stems as well as roots Ans: (c) Q109. Cud-chewing animals are known as (a) Frugivores Q102. Endospermic seeds are found in (b) Sanguivores (a) Carica papaya (c) Ruminant (b) Dolichos lablab (c) Gourd (d) Cannibals (d) Pisum sativum Ans: (c) Ans: (a) Q110. Deficiency of iron in human diet causes Q103. In root, the pericycle is (a) Goitre (a) Single layered (b) Scurvy (b) Tow layered (c) Anaemia (c) Three layered (d) Rickets (d) Absent Ans: (c) Ans: (a) Q111. Enzymes help in Q104. Monocot root differs from dicot root in having (a) Respiration (a) Open vascular bundles (b) Scattered vascular bundles (b) Digestion of food (c) Well developed pith (c) Immune system (d) Radially arranged vascular bundles (d) Reproduction Ans: (c) Ans: (b) 8 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q112. Food is normally digested in the Q119. Phenomenon which converts light energy into (a) Liver chemical energy is (b) Stomach (a) Respiration (c) Small intestines (b) Photosynthesis (d) Large intestines (c) Transpiration Ans: (c) (d) None of these Ans: (b) Q113. Glucose is mainly absorbed in (a) PCT Q120. Photosynthesis is a process (b) DCT (a) Reductive and exergonic (c) Henle's loop (b) Reductive and catabolic (d) Nephron (c) Reductive, endergonic and catabolic Ans: (a) (d) Reductive, endergonic and anabolic Ans: (d) Q114. Heightened emotion is caused by the (a) Pituitary glands Q121. Photosynthesis takes place faster in (b) Thyroid glands (a) Yellow light (c) Adrenal glands (b) White light (d) Salivary glands (c) Red light Ans: (c) (d) Darkness Ans: (b) Q115. Main substance involved in transfer of electrons in Q122. Plants absorb dissolved nitrates from soil and photosynthesis is convert them into (a) Phytochrome (a) Free nitrogen (b) Cytochrome (b) Urea (c) FAD (c) Ammonia (d) Both (a) and (b) (d) Proteins Ans: (b) Ans: (a) Q116. Man in the life cycle of Plasmodium is Q123. Plants absorb most of the water needed by them (a) Primary host through their (b) Secondary host (a) Embryonic zone (c) Intermediate host (b) Growing point (d) None of these (c) Root hairs Ans: (b) (d) Zone of elongation Q117. Mango contains vitamins Ans: (c) (a) A and B (b) B and C (c) A and C (d) B and E Ans: (c) Q118. O2 released in the process of photosynthesis comes from (a) CO2 (b) Water (c) Sugar (d) Pyruvic acid Ans: (b) 9 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q124. Plants are killed in winter by frost because Q132.Fish respire through their (a) No photosynthesis occurs at low temperature (a) nose (b) Of desiccation (b) lungs (c) Water in the plants freezes (c) gills (d) Water in the plants evaporates (d) fins Ans: (b) Ans: (c) Q125. Plants have ____________ while animals lack it. Q133. Which of the following are involved in the process (a) Starch of breathing in humans? (b) Cellulose (a) nervous system (c) Protein (b) diaphragm (d) Fat (c) rib muscles Ans: (b) (d) All of these Ans: (d) Q126. Plants receive their nutrients mainly from (a) Chlorophyll Q134. The diaphragm assists in (b) Atmosphere (a) digestion (c) Light (b) respiration (d) Soil (c) circulation of blood Ans: (d) (d) excretion of waste Q127. Plants synthesise protein from Ans: (b) (a) Starch Q135. The exchange of gases in mammals takes place in (b) Sugar the (c) Amino acids (a) larynx (d) Fatty acids (b) trachea Ans: (c) (c) alveoli Q128. Pulses are a good source of (d) bronchi (a) Carbohydrates Ans: (c) (b) Fats (c) Proteins Q136. Which of the following creatures has no blood but (d) Vitamins respires? Ans: (c) (a) Cockroach Q129. The alimentary canal is usually longer in (b) Earthworm (a) Carnivores (c) Fish (b) Herbivores (d) Hydra (c) Omnivores Ans: (d) (d) Insectivores Q137. A drop of blood contains Ans: (b) (a) about 10,000 cells Q130. Adenosine Triphosphate (ATP) is (b) about 1,00,000 cells (a) an enzyme (c) several million cells (b) a protein (d) less than 25,000 cells (c) a hormone Ans: (c) (d) a molecule with high energy bonds Ans: (d) Q138. A man weighing 96 kg, consists of approximately Q131. During the day time plants _______________ litres of water. (a) take in oxygen and give out carbon dioxide (a) 501 (b) take in carbon dioxide and give out oxygen (b) 66.51 (c) take in nitrogen and give out oxygen (c) 821 (d) take in carbon dioxide and give out nitrogen (d) 421 Ans: (b) Ans: (b) 10 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q139. A person having which of the following blood Q147. If we are to measure the length of blood vessels in groups can receive blood of any group? our body, how many kilometres would it add up to? (a) A (a) 10 km (b) AB (b) 1,000 km (c) B (c) 96,000 km (d) O (d) 10,000 km Ans: (b) Ans: (c) Q140. A person of which of the following blood groups Q148. Lungs are enclosed in is called a universal donor? (a) pericardium (a) O (b) peritoneum (b) AB (c) pleural membrane (c) A (d) none of these (d) B Ans: (c) Ans: (a) Q149. Lungs are situated in the Q141. Blood does not coagulate inside the body due to (a) abdominal cavity the presence of (b) pericardial cavity (a) haemoglobin (c) buccal cavity (b) heparin (d) thoracic cavity (c) fibrin Ans: (d) (d) plasma Ans: (b) Q150. Minute, circular discs floating in the blood, which carry oxygen to the tissues, and carbon dioxide away Q142. Blood haemoglobin has high affinity for from them, are called (a) CO2 (a) White blood corpuscles (WBC) (b) CO (b) Red blood corpuscles (RBC) (c) O2 (c) Monophylls (d) H Ans: (b) (d) Erythrocytes Ans: (b) Q143. Ductless glands are known as (a) exocrine glands Q151. The study of pollen grain is known as : (b) endocrine glands (a) Palaeobotany (c) tubular glands (b) Palynology (d) alveolar glands (c) Pomology Ans: (b) (d) Phonology Ans: (b) Q144. What happens during seed germination? (a) Heat is liberated Q152. The branch of biology that deals with the study of (b) Starch is synthesised trees is called: (c) Fat is synthesised (a) Dendrology (d) Light is absorbed (b) Palaeobotany Ans: (a) (c) Taxonomy Q145. Human blood contains _____________ percentage (d) Teratology of plasma. Ans: (c) (a) 35% Q153. Consider the following pairs: (b) 40% 1. Entomology-Study of insects (c) 50% 2. Mycology-Study of algae (d) 65% 3. Pedology-Study of soils Ans: (d) 4. Pharmacology Study of medicine and their effect Q146. Human urine as compared to human blood is Which of the above pairs are correctly matched? (a) hypotonic (a) 1 and 4 (b) hypertonic (b) 3 and 4 (c) isotonic (c) 1, 3, and 4 (d) all of these (d) 1, 2, 3, and 4 Ans: (b) Ans: (b) 11 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q154. Which of the following characteristics distinguish Which of the above statement/s is/are true? man from other animals? (a) 1, 2 and 4 1. His capacity to adapt to the needs of the environment (b) 2 and 4 2. His curiosity (c) 2 and 3 3. His blood groups (d) 1 and 3 4. His DNA Select the correct answer from the following: Ans: (d) (a) 1, 3 and 4 Q159. Which of the following vertebrates are without (b) 2 and 4 teeth? (c) 1, 2, 3 and 4 (d) Only 2 1. Jawless fishes Ans: (b) 2. Turtles and tortoises 3. Toads Q155. The smallest living cell is that of a (a) bacterium 4. Birds (b) bread mold Codes: (c) mycoplasma (a) 1, 2 (d) virus (b) 2, 3 Ans: (c) (c) 1, 4 Q156. Which of the following cell organelles are not (d) 2, 4 found in a bacterial cell? Ans: (c) 1. Glyoxysomes 2. Lysosomes Q160. Which of the following animals are dolphins not 3. Mitochondria closely related to? 4. Ribosomes (a) Whales Select the correct answer using codes given below: (b) Porpoises (a) 1 and 4 (c) Dugong (b) 2 and 4 (d) All of the above (c) 1, 2 and 3 Ans: (b) (d) 1, 2, 3 and 4 Ans: (a) Q161. Which of the following animals have flippers? Q157. A particular cell organelle is sometimes referred to (a) Tortoise as the 'suicide bag' because it contains certain enzymes (b) Turtle that can break down the cell components or even the (c) Water Snake whole cell. (d) Tortoise and Turtle Which one of the following is such an organelle? Ans: (d) (a) Lysosome (b) Mesosome Q162. The largest of the living birds is (c) Phagosome (a) cassowary (d) Ribosome (b) albatross Ans: (d) (c) elephant bird Q158. Consider the following statements and select the (d) ostrich correct answer from the codes given below: Ans: (b) 1. Viruses are obligate parasites and cannot be cultured on a synthetic medium Q163. The mammal that lays eggs is 2. The red snow phenomenon observed in some alpine (a) kangaroo and arctic regions is caused by a lichen growing in these (b) duck-billed platypus areas (c) opossum 3. The red rust of tea is caused by a green alga (d) otter 4. A solution of chlorophyll pigments looks red in reflected light due to the phenomenon of diffraction. Ans: (a) 12 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q164. Deadliest venomous snakes of India are Q170. The tissue that is involved in the transport of food 1. King Cobra material in plants is called: 2. Python (a) parenchyma 3. Common Krait (b) phloem 4. Russel's Viper (c) sclerenchyma The correct response is (d) xylem (a) 1, 3, 4 Ans: (b) (b) 1, 2 (c) 2, 3, 4 Q171. The only connective tissue in which the cells occur (d) 1, 2, 3 in groups or rows are Ans: (b) (a) bone Q165. Which one of the following marine animals is not (b) cartilage a mammal? (c) tendon (a) Sea-cow (d) ligament (b) Sea-horse Ans: (c) (c) Sea-lion (d) River horse Q172. The life span of human erythrocytes is Ans: (c) approximately (a) 90 days Q166. Sea -horse found in Marine National Park in Kutch (b) 100 days is a: (a) shark (c) 120 days (b) marine mammal (d) 150 days (c) marine teleost Ans: (d) (d) lobster Q173. The phlegm that accumulates in the bronchi and Ans: (c) cleared during coughing is Q167. Syncytium is formed by (a) stratified squamous epithelium (a) primitive reticular cells (b) stratified columnar epithelium (b) phagocytic reticular cells (c) simple columnar ciliated epithelium (c) endothelial cells (d) pseudostratified columnar ciliated epithelium (d) sensory cells Ans: (a) Ans: (c) Q168. The tissue that forms the basal framework of Q174. Ependymal cells lining the cavity of brain and lymphoid organs, bone marrow and liver are spinal cord constitute (a) lymphoid tissue (a) epithelioid tissue (b) areolar tissue (b) ealse epithelium (c) reticular tissue (c) mesothelium (d) elastic tissue (d) endothelium Ans: (d) Ans: (b) Q169. The cells that are directly concerned with Q175. Chocolates can be bad for health because of a high phagocytosis of foreign bodies in the reticuloendothelial content of system are (a) Cobalt (a) reticular cells (b) monocytes (b) Nickle (c) eosinophils and Basophils (c) Zinc (d) macrophages (d) Lead Ans: (b) Ans: (b) 13 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q176. Consider the following statements: Q181. Following replacement of breast feeding by less 1. Normal diet should contain 75gm of fat. nutritive food, low in proteins and calories, infants 2. Fatty acids should be a part of human diet. below the age of one year suffer from: 3. The cells of the human body cannot synthesise any (a) kwashiorkor fatty acids. (b) marasmus 4. Deficiency diseases develop due to the absence of unsaturated fatty acids called essential fatty acids. (c) rickets Which of the above statements are correct? (d) pellagra (a) 1, 2 Ans: (c) (b) 2, 3 Q182. In countries where polished rise is the main cereal (c) 1, 2, 3, 4 (d) 1, 2, 4 in their diet, people suffer from Ans: (b) (a) pellagra (b) scurvy Q177. Pernicious anaemia in humans is caused by the (c) beriberi deficiency of (a) Pyridoxine (Vitamin B6) (d) osteomalacia (b) Cyanocobalamin (Vitamin B12) Ans: (a) (c) Thiamine (Vitamin B1) Q183. Per cent oxygen in the exhaled air is (d) Pantothenic acid (Vitamin B5) (a) 0 Ans: (b) (b) 6 Q178. Exposure to sunshine and diet rich in fish liver (c) 12 oils, oatmeal and sweet potatoes will not cause the (d) 16 deficiency disease Ans: (a) 1. Osteomalacia 2. Osteoporosis and frequent bone fractures Q184. In children the lungs are pale pink due to 3. Rickets (a) Rich blood supply 4. Fatty liver (b) Greater binding affinity of haemoglobin for oxygen (a) 1, 2 (c) Formation of a higher percentage of oxyhaemoglobin (b) 1, 2, 3 (c) 1, 3 as per higher metabolic rate (d) 1, 2, 3, 4 (d) All of them Ans: (b) Ans: (a) Q179. A vast proportion of our body's weight is made up Q185. When the oxygen to the tissues becomes of inadequate, the condition is called (a) bones (a) hypoxia (b) water (c) organs (b) anoxia (d) skin, tissues and organs (c) asphyxia Ans: (d) (d) dyspnoea Ans: (c) Q180. Corporate executives who work in top notch companies and travel to their offices in early morning in Q186. During quiet inspiration, the air that remains their air conditioned cars with tinted glasses spending occupying the mouth, pharynx, trachea and passages up their entire day in their cabins are prone to suffer from to terminal bronchioles forms the deficiency of: (a) 'Passive' dead space (a) calcitonin (b) cynacobalamin (b) 'Physiological' dead space (c) tocopherol (c) 'Anatomical' dead space (d) cholecalciferol. (d) 'Lobular' dead space Ans: (b) Ans: (d) 14 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q187. Upon the entry of carbon dioxide in the red blood (c) Right auricle - right ventricle - pulmonary veins - cells, H+ionsare formed at a very rapid rate, and yet the lungs - pulmonary artery - left auricle -left ventricle - blood does not turn acid because aorta (a) H+ ions are rapidly exchanged at the expense of (d) Right auricle - right ventricle - pulmonary artery - HCO3-ions lungs - pulmonary veins - left auricle - left ventricle - (b) H+ ions are rapidly removed and excreted in the aorta urine Ans: (b) (c) H+ ions are buffered by proteins of haemoglobin and Q193. The chamber of the mammalian heart from which plasma deoxygenated blood is sent for oxygenation is (d) H+ ions are buffered by proteins of haemoglobin and (a) right auricle proteins and phosphates of plasma (b) right ventricle Ans: (c) (c) left auricle (d) left ventricle Q188. Carbon dioxide entering the red blood corpuscles Ans: (d) from the tissues is partially taken up by haemoglobin to form Q194. The vessels that supply blood to the heart are (a) carboxyhaemoglobin (a) vasa vasorum (b) carbonylhaemoglobin (b) cardiac (c) carbaminohaemoglobin (c) coronoid (d) carbomoylhaemoglobin (d) coronary Ans: (a) Ans: (a) Q195. The wall of the left ventricle is much thicker than Q189. The digestive and respiratory passages cross in the that of right ventricle because (a) pharynx (a) it accommodates more blood (b) larynx (b) it receives oxygenated blood with tremendous force (c) esophagus from various parts of the body (d) trachea (c) it pumps oxygenated blood with tremendous force to Ans: (b) various parts of the body Q190. The amount of air breathed in and out in a single (d) it is engineered to carry blood with a high quantum quiet respiration is about of oxygen and nutrients Questions (a) 250 ml Ans: (c) (b) 500 ml Q196. Blood flows via the out flow tracts of the heart into (c) 750 ml (a) aorta and carotid arteries (d) 1000 ml (b) aorta, carotid and subclavian arteries Ans: (d) (c) aorta and pulmonary artery (d) both (b) & (c) Q191. The chamber of the heart that receives Ans: (b) deoxygenated blood from the various parts of the body is Q197. Out of 24 hours the human heart works, ventricles (a) Sinus venous contact for (b) Left auricle (a) 6 hours (c) Right auricle (b) 9 hours (d) Right venous (c) 11 hours Ans: (d) (d) 12 hours Ans: (b) Q192. The route of circulation in the human heart (a) Left auricle - right auricle - right ventricle - Q198. Impulses from the pace -maker cause the pulmonary artery - lungs - pulmonary veins - Left (a) ventricles to contract (b) auricles to contract ventricle - aorta (c) both the ventricle and auricle to contract (b) Right auricle - left auricle - right ventricle - (d) heart to relax pulmonary artery - lungs - pulmonary veins -left Ans: (b) ventricle - aorta 15 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q199. The fluid reaching the distal convoluted tubule Q206. Vitamin D is manufactured by the activation of from the ascending limb of Henle's loop is ergosterol by U.V light in the (a) isotonic in respect of plasma (a) liver (b) hypotonic in respect of plasma (b) skin (c) hypertonic in respect of plasma (c) bone (d) variable (d) muscle Ans: (a) Ans: (b) Q200. Of the 125 ml of glomerular filtrate produces each Q207. Consider the following statements: minute, the amount of urine formed is 1. In a resting neuron, there is difference in electrical charge on either side of surface membrane called (a) 1 ml/mt potential difference. (b) 1.5 ml/mt 2. It is due to unequal distribution of K+ ions and Na+ (c) 2.0 ml/mt ions on either side if the membrane. (d) 5.0 ml/mt 3. The Na+ concentration inside a cell is about 28 to 30 Ans: (b) times > than it is outside Q201. The substance which is reabsorbed as well as 4. The K+ ions concentration is about 14 times > outside excreted by the kidney tubule is than inside. (a) H+ Which of these above statements are correct? (b) K+ (a) 1 only (c) Na+ (b) 1, 2 (d) Creatinine (c) 1, 2, 3 Ans: (b) (d) 1, 2, 3, 4 Ans: (b) Q202. When urine is passed out several -fold more than in a normal subject, the condition is referred to as Q208. Consider the following statements: 1. Even when a nerve cell is not conducting an impulse, (a) Diabetes mellitus it is actively transporting K+ and Na+ ions in and out (b) Diabetes insipidus respectively against their concentration gradients at the (c) Diabetes aqua expense of energy (d) Diabetes polydipsia 2. As a consequence of the operation of the Na- K pump, Ans: (c) there is a concentration gradient for Na+ and K+ ions. Q203. The final concentration of the fluid to produce a 3. As a result, K+ diffuse out of the cell, and Na+ ions markedly hypertonic urine takes place in into the cell. (a) Loop of Henle 4. Eventually, there is difference in charge on either said (b) Distal convoluted tubule of the membrane, positive inside and negative outside. (c) Collecting tubule Which of the above statements is/are untrue? (d) Both (b) and (c) (a) 1 only Ans: (c) (b) 1, 2, 4 (c) 2, 4 Q204. The need to produce concentrated urine is (d) 4 only detected in the brain is due to the increase in the Ans: (d) concentration of (a) Glucose in the blood (b) K+ in the blood (c) Na+ in the blood (d) Carbonic acid in the blood Ans: (c) Q205. Skin becomes wrinkled in the old age due to (a) loss of elastic tissue in the dermis (b) considerable slag in the rate of dividing cells in the stratum germinativum (c) gradual loss of elasticity in the subcutaneous layer (d) all of these Ans: (b) 16 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q209. Consider the following statements: Q213. The connective tissue layer that surrounds each 1. When a nerve fibre is stimulated, a profound change individual fibre in the nerve is is produced in the electrical properties of surface (a) epineurium membrane and in steady potential. (b) perineurium 2. Upon excitation, the resting potentialis suddenly (c) perineural septum changed. (d) endoneurium 3. It is due to sudden and several hundred -fold increase Ans: (d) in permeability to Na+ ions. 4. With Na+ ions moving inside the point of stimulation, Q214. Spinal cord is a long narrow and almost cylindrical the positive charge inside the nerve cell increases and structure that extends from the brain to the reaches a peak called “action potential”. (a) coccygeal region Which of the following statement are correct? (b) sacrum (a) 1, 2, 3 (c) first lumbar vertebra (b) 2, 3 (d) last lumbar vertebra (c) 1, 2, 3, 4 Ans: (c) (d) 1, 2, 4 Ans: (d) Q215. The segment of a myofibril that is called a sarcomere runs from Q210. Consider the following statements: (a) one Z-line to the next Z-line 1. Propagation of a nerve impulse in a myelinated nerve fibre is different from that of unmyelinated fibre. (b) one A-band to the next A-band 2. The impulse actually travels by leaping through the (c) one H-zone to the next H-zone nodes of Ranvier in an unmyelinated fibre (d) one end of a skeletal muscle to the opposite end 3. The local circuits occur only at the internodes and at Ans: (a) each node, the action potential is boosted to the same Q216. The H-disk in the skeletal muscle fibre is due to height by ionic mechanisms. (a) the absence of myofibrils in the central portion of A- 4. In the rest of the internodes, such an exchange is not band possible due to the presence of myelin sheath acting as an insulator. (b) the central gap between myosin filaments in the A- Which of the above statements are incorrect? band Questions (a) 1, 2 (c) the central gap between actin filaments extending (b) 1, 3, 4 through myosin filaments in the A-band (c) 2 only (d) birefringence of myosin filaments in the central (d) 2, 3 portion of A-band Ans: (d) Ans: (c) Q211. The white matter present in the brain and spinal Q217. The muscle fatigue occurs due to the release of cord consists of (a) acetylcholine (a) neuroglia (b) lactic acid (b) myline sheath (c) adrenaline (c) terminal arborizations of axons (d) none of these (d) cellular sheath of Schwann Ans: (b) Ans: (b) Q212. The synaptic knobs represent the terminal endings Q218. Myosin bridges can be prevented from combining of actin by two regulator proteins in resting muscle by (a) the neuron (a) troponin (b) the dendron (b) myofibril (c) the axon (c) troponin and tropomyosin (d) the telodendria (d) natural inhibiting proteins Ans: (d) Ans: (c) 17 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q219. Consider the following statements: Q224. The total number of ears bones are 1. Cross bridges can cause muscle contraction. (a) 2 2. They are able to oscillate back and forth and hook up (b) 4 with active sites on actin filaments (c) 6 3. The bridges enable the thin filaments to pull the thick (d) 8 filaments by a kind of back and forth movement. Ans: (c) 4. A single bridge thus hooks onto an active site, pulls the thin filaments a short distance, then releases it and again Q225. Many persons, who are occupied with desk work hooks on the next active site. for long hours, have a tendency to suffer from cervical Which of the above statements are correct? spondylosis. (a) 1, 2 This is caused due to decrease in the intervertebral disk (b) 2, 3 space between (c) 1, 2, 4 (a) 5, 6 and 7 cervicals (d) 1, 2, 3, 4 Ans: (c) (b) 6, 7 and 8 cervicals (c) 7, 8 and 9 cervicals Q220. Which term is the smallest subdivision in this (d) all of these group? Ans: (a) (a) Fibre (b) Fibril Q226. Acetabulum is formed by the fusion of (c) Filament (a) ilium and ischium (d) Myosin (b) ischium and pubis Ans: (c) (c) ilium and pubis Q221. Why can cardiac muscle fibres contract for longer (d) ilium, ischium and pubis periods than skeletal fibres? Ans: (d) (a) Cardiac muscle is self-excitatory (b) Extracellular calcium partially controls the strength Q227. The bone that serves to transmit the weight of the (and length) of contraction body to the ground and forms a strong lever for the (c) Cisternae of T-tubules are more developed in cardiac muscles of the calf of the leg is muscle (a) astragalus (d) Cardiac muscle is uninucleate rather than (b) calcaneum multinucleate (c) navicular Ans: (a) (d) talus Q222. One of the following statements about muscular Ans: (b) responses is not true. Choose that one Q228. While writing, the main bones in the hand that (a) A muscle fibre contracts in all-or-none fashion (b) There is a slight latent period that occurs between mainly help hold the pen in position are: when the stimulus arrives at the muscle and when a (a) phalanges muscle contracts. (b) carpals (c) Muscles will add motor units to a contraction, (c) metacarpals increasing the overall force of contraction (d) all of these (d) When a person is fully at rest, none of the muscles are Ans: (a) contracting in the body Ans: (d) Q229. In the event of a fall of a woman in the bathroom, the head of the femur separated off the bone. An X-ray Q223. The bone that makes possible rotation of the neck revealed that it did not fit into is (a) glenoid cavity of the plevis (a) atlas vertebra (b) axis vertebra (b) acetabulum of pelvis (c) occipital condyles of the skull (c) obturator foramen of pelvis (d) atlas vertebra and occipital condyles of the skull (d) pelvic cavity Ans: (b) Ans: (b) 18 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q230. The cow while standing up from the sitting Q236. Consider the following statements about posture initially takes support and puts its body weight pollination. on: 1. Transfer of pollen grains from the anther to ovules in (a) patellas of the forelegs the same flower or a different f lower is called (b) shanks of the forelegs pollination. 2. The pollination by wind is called anemophily. (c) both the forelegs 3. Pollination is a prerequisite for seed and fruit (d) the patellas and shanks of both the fore and hind legs development in all flowering plants. Ans: (a) 4. Seeds may develop in some water ferns without Q231. The testes normally descend into the scrotum pollination. about Which of the above statement/s is/are correct? (a) 6 months into pregnancy (a) 1 and 3 (b) the time of birth (b) 1, 2 and 4 (c) Only 2 (c) the age of 3 months (d) 1, 2, 3 and 4 (d) the time of puberty Ans: (c) Ans: (b) Q237. During pregnancy, corpus luteum, having Q232. Menopause usually occurs between secreted increasing quantities of progesterone that helps (a) 30 and 35 years build up endometrium of the uterus, suddenly declines (b) 35 and 40 years in functioning in the (c) 40 and 45 years (a) 14th week (d) 45 and 50 years (b) 16th week Ans: (d) (c) 11th week (d) 12th week Q233. In humans, ovarian follicles reach maturity from Ans: (d) the beginning of a menstrual cycle in Q238. Plants that flower after reaching a certain stage of (a) 5 to 7 days development irrespective of the day length are called: (b) 7 to 9 days (a) Day-neutral plants (c) 10 to 14 days (b) Long-day-short-day plants (d) 14 to 16 days (c) Negatively phototrophic plants Ans: (c) (d) Long-day plants Q234. Some plants develop fruit s without fertilization. Ans: (a) This phenomenon is called Q239. The plants growing in temperate climates are (a) apocarpy usually: (b) apogamy (a) Short-day plants (c) parthenocarpy (b) Day neutral plants (d) syncarpy (c) Long-day plants Ans: (c) (d) Long-day-short-day plants Ans: (a) Q235. The increase in population all over the world is Q240. The effect of light on flowering plants is mediated due to through a photoreceptor compound. Which of the (a) tremendous increase in birth rate following is such a compound? (b) significant decrease in death rate (a) Cytochrome (c) gradual decrease in morbidity rate (b) Cryptochrome (d) failure to adopt family planning contraceptive (c) Phytochrome devices (d) Phycoerythrin Ans: (d) Ans: (c) 19 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q241. Which of the following statements are true? Q245. That genes control heredity through their control 1. Cytokinins promote stomatal opening on enzyme synthesis and that one gene controls the 2. Sprays of indole -3 acetic acid can inhibit premature sythesis of one enzyme - the one gene one enzyme fruit fall hypothesis — was proposed by 3. The growth movements caused by a unilateral (a) Beadle and Tatum (b) Darwin stimulus are known as nastic movements (c) Mendel 4. The seeds of desert plants will not germinate unless (d) Morgan they have been subjected to a high temperature for some Ans: (a) time Questions Select the correct answer from the following: Q246. Gregor Mendel is often referred to as the Father of (a) 1, 2, and 4 Genetics since he first enunciated the Principles of Heredity. His experimental material was (b) 2 and 4 (a) fruit fly (c) 1, 2, and 4 (b) bread mould (d) 1, 2, 3, and 4 (c) pea plant Ans: (a) (d) rhesus monkey Q242. Which of the following plant organ/s have Ans: (c) determinate growth? Q247. Down Syndrome, a congenital genetic disorder in 1. Dicot leaves and internodes human beings, is cased by : 2. Fruits (a) a defective recessive gene in homozygous condition 3. Grass leaves and internodes (b) an extra x chromosome 4. Rhizomes and tubers (c) trisomy of chromosome 18 Select the correct answer from the following: (d) trisomy of chromosome 21 (a) 1 and 3 Ans: (d) (b) 2 and 4 Q248. Consider the following human diseases: (c) 1, 2, and 4 1. Anaemia (d) 1, 2, 3, and 4 2. Haemophilia Ans: (c) 3. Leukemia 4. Phenylketonuria Q243. Consider the following pairs Plant hormone Which of the above diseases are hereditary in nature? Function/Effect (a) 1, 2 and 3 1. Indole-3 acetic acid — Rooting in cuttings (b) 1 and 4 2. Gibberellic acid — Stomatal closure (c) 2 and 3 3. Ethylene — Fruit ripening (d) 2 and 4 4. Zeatin — Cell division Ans: (d) Which of the above pairs are correctly matched? Q249. A white woman marries a black man. They have Select the correct answer from the following: four children — 2 sons and 2 daughters. What (a) 1 and 3 proportion of these chi 1dren is likely to be black (b) 1, 2, and 4 (a) 25% (c) 2 and 4 (b) 50% (d) 1, 2, 3, and 4 (c) 100% Ans: (b) (d) none Ans: (d) Q244. Which of the following plant hormone was first Q250. That some human diseases are genetically isolated from a fungus? controlled was first established by (a) Ethylene (a) Gregor Mendel (b) Gibberellic acid (b) A E Garrod (c) Kinetin (c) Watson and Crick (d) Zeatin (d) William Bateson Ans: (b) Ans: (b) 20 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q251. Which of the following genetic disorders in man Q256. Which of the following plant diseases are caused are caused by a dominant gene? by viruses? 1. Edwards Syndrome 1. Aster yellows 2. Huntington's disease 2. Foot rot of paddy 3. Marfan Syndrome 3. Leaf curl of tobacco 4. Thalassemia 4. Little leaf of Sweet potato Select the correct answer using codes given below: Which of the above disease/s is/are caused by the (a) 1 and 3 bacteria? (b) 1 and 4 (a) 1 and 3 (c) 2 and 3 (b) 1, 2, and 4 (d) 2 and 4 (c) 2 and 4 Ans: (c) (d) 3 and 4 Q252. Consider the following plant diseases: Ans: (a) 1. Brown rot of potatoes. Q257. Which of the following plant disease/s is/are 2. Citrus dieback caused by fungi? 3. Tikka disease of peanut 1. Brown rot of potatoes 4. Tundu disease of wheat Which of the above disease/s is/are caused by the 2. Foot rot of paddy bacteria? 3. Heart rot of beets (a) 1 and 3 4. Tikka disease of peanut (b) 1 and 4 Select the correct answer using codes given below: (c) Only 2 (a) Only 1 (d) 2 and 4 (b) 1 and 3 Ans: (b) (c) 2 and 4 (d) Only 4 Q253. One of the greatest famines of the nineteenth Ans: (c) century suffered by the Irish people which led to over 1 million deaths due to starvation was caused by a fungal Q258. Which of the following is a bacterial disease? infection of the potato crop. The disease it caused was (a) Early blight of potatoes (a) early blight of potatoes (b) Loose smut of wheat (b) heart rot of potatoes (c) Red rot of sugarcane (c) late blight of potatoes (d) Red stripe of sugarcane (d) potato mosaic Ans: (d) Ans: (c) Q259. The disease not transmitted by house - fly is - Q254. The water core disease of apples is caused by (a) cholera (a) boron deficiency (b) enteric fever (b) bacterial infection (c) dengue fever (c) fungal infection (d) dysentery (d) high temperatures Ans: (d) Ans: (d) Q260. Other than spreading malaria, Anopheles Q255. The necrotic ring spot disease of stone fruits (cherry, peach, plum, etc.) is caused by mosquitoes are also vectors of - (a) a bacterium (a) dengue fever (b) fungal infection (b) filariasis (c) molybdenum deficiency (c) encephalitis (d) virus (d) yellow fever Ans: (d) Ans: (b) 21 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q261. Which of the following statements are not true in Q266. A simple sequence in which the grass grows, a respect of HIV/AIDS transmission? cow eats the grass, a human eats the cow or drinks its (a) HIV infection is usually spread by having sexual milk, is an example of - (b) HIV frequently spreads among injection drug users (a) food chain who share syringes. (b) food web (c) Women can spread HIV to their babies during (c) food cycle pregnancy, birth or breast feeding. (a) pyramid (d) HIV spreads through casual contact such as sharing Ans: (a) towels and bedding or via swimming pools or toilet seats Q267. In overpopulated parts of the world where there Ans: (a) is shortage of food, the inhabitants should feed predominantly on - Q262. A group of diseases normally transmitted between (a) rice, wheat and other food grains vertebrate animals and man is - (b) herbivores (a) yellow fever, plague, taeniasis (c) small carnivores (b) plague, rabies, smallpox (d) large carnivores (c) ancylostomiasis, ascariasis, plague Ans: (a) (d) plague, rabies, taeniasis Ans: (d) Q268. Which one of the following groups of organisms is thermophilic in that they can tolerate and grow at fairly Q263. The first effective vaccine against polio was high temperatures? prepared by - (a) Certain bacteria and blue-green algae (a) John Heynsham Gibbon (b) Loris, rhesus monkey and red kangaroo (b) James Simpson (c) Llamas, camels and yaks (c) Jonas E. Salk (d) Bison, musk-ox and racoon (d) Robert Edwards Ans: (a) Ans: (c) Q269. The density of population in a country is obtained Q264. A doctor advises a patient to take plenty of citrus by counting the total number of individuals - fruits, guavas, tomatoes and amlas over a period of two (a) in respect of fertile land area months regularly. What do you think is the complaint of (b) in respect of total land area the patient? (c) in respect of habitable and inhabitable areas (a) Softness and pain in bones, bending of vertebral (d) per unit area column Ans: (d) (b) Gums spongy, swollen and bleed easily Q270. A powerful eye irritant present in smog is - (c) Blurred vision, burning and dryness of eye and (a) ozone tongue, cracking of skin of angle of mouth (b) nitric oxide (d) Extreme weakness, swelling and pain in legs, loss of (c) peroxyacetyl nitrate appetite, headache (d) sulphur dioxide Ans: (b) Ans: (c) Q265. Which one of the following groups of diseases Q271. Coal burning power plants and factories are spreads through mosquito bites among humans? responsible for about 86% of - (a) Malaria, filariasis, poliomyelitis (a) carbon monoxide in the atmosphere (b) Ancylostomiasis, ringworm, dengue fever (b) sulphur dioxide in the atmosphere (c) Dengue fever, viral encephalitis, yellow fever (c) chlorine in the atmosphere (d) Filariasis, malaria, ascariasis (d) nitrogen dioxide in the atmosphere Ans: (c) Ans: (b) 22 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q272. Consider the following statements: Q277. The theory of spontaneous generation of life was 1. Malaria can be contained with the introduction of experimentally disproved by: larvicidal fish, gambusia, in ponds, tanks and puddles. 1. Francesco Redi 2. Gambusia is highly specific in devouring larvae of 2. Lamark female anopheline mosquitoes. 3. Leeuwenhock Which of the above statements are true? 4. Louis Pasteur (a) 1, 2 Select the correct answer using the codes given below: (b) 1 only (a) Only 1 (c) 2 only (b) 2 and 3 (d) Neither of the two (c) 1 and 4 Ans: (b) (d) Only 4 Ans: (c) Q273. The theory of spontaneous generation of life was proposed by: Q278. Who among the following demonstrated (a) Aristotle experimentally that simple organic molecules like sugar (b) Lamark s and amino acids could be produced from inorganic (c) Leewen hock molecules if early earth atmosphere is created (d) Louis Pasteur (a) Donald Brown Ans: (a) (b) A.I. Oparin (c) Oscar Miller Q274. The atmosphere of the primitive earth before (d) Stanley Miller origin of life consisted of: Ans: (d) (a) Nitrogen, Oxygen, Ammonia, and Water vapour (b) Methane, Ammonia, Hydrogen, and Water vapour Q279. The Theory of Inheritance of Acquired Characters (c) Nitrogen, Oxygen, Water, and Carbon dioxide for the origin of species was proposed by: (d) Ammonia, Water, Oxygen, and Hydrogen (a) Jean Lamark Ans: (b) (b) J.B.S. Haldane (c) August Weismann Q275. That life arose from interactions of simple (d) Harold Urey chemical compounds on primitive earth, the Ans: (a) chemosynthetic theory of life, was proposed by: (a) A.I. Oparin Q280. Which of the following drugs is not a (b) Louis Pasteur hallucinogen? (c) Charles Darwin (a) LSD (d) Lamark (b) Heroin Ans: (a) (c) Marijuana (d) Mescaline Q276. Consider the following statements: Ans: (b) 1. The atmosphere of the primitive earth was reducing Q281. Alcohol is a common - 2. The primary source of energy for the chemosynthetic (a) stimulant reactions on earth that led to the origin of life was the (b) depressant solar energy (c) hallucinogen 3. Liquid water did not exist on early earth (d) none of these 4. Energy for the synthesis of organic molecules from Ans: (b) simple inorganic molecules on earth was provided by lightening, ultra violet light, and cosmic rays Q282. Which of the following hallucinogens is taken by Select the correct answer using the codes given below: smoking, chewing or sniffing? (a) 1 and 2 (a) Mescaline (b) 1 and 4 (b) LSD (c) 1, 2, and 3 (c) Psilocybin (Mushroom) (d) 1, 3, and 4 (d) Marijuana Ans: (d) Ans: (d) 23 www.teachersadda.com | www.sscadda.com | www.bankersadda.com | www.adda247.com Q283. Which of the following drugs cause death by Q289. The carbohydrate content in a hen's egg - common respiratory failure due to overdose? (a) 0.0 g (a) Marijuana (b) 0.5 g (b) Reserpine (c) 1.3 g (c) Heroin (d) 2.5 g (d) Mathadrine Ans: (a) Ans: (c) Q290. About 55 per cent of India's sheep population is located in - Q284. The excessive and chronic use of which of the drug (a) North western region cause uncontrollable trembling, unable to converse, and (b) Temperate Himalayan region a victim of terrifying hallucinations? (c) Southern region (a) Ethanol (d) Eastern region (b) Methanol Ans: (c) (c) Isopropyl alcohol Q291. Which of the following breeds of chic ken is the (d) Codeine most prolific egg layer in the world? Ans: (a) (a) Astro White Q285. Which of the following drugs cause d elusions (b) Brahma involving people's feelings more than their senses, and (c) Black Minorca people feel that others are trying to injure them? (d) White Leghorn (a) Cocaine Ans: (d) (b) Marijuana Q292. The tallest breed of sheep in India is - (c) Nicotine (a) Marwari (d) Opium (b) Nellore Ans: (b) (c) Kathiawari (d) Rampur Bushair Q286. Excessive/chronic use of which of the following Ans: (b) drugs is the root cause of lung cancer, cough bronchitis,