OUAT-2020 Biology Past Paper PDF

BIDYASAGAR CLASSES, BHUABNESWAR OUAT-2020 BIOLOGY 133. The foods made from genetically modified crops required 143. Darwin’s finches provide an excellent evidence in favour to pa...

BIDYASAGAR CLASSES, BHUABNESWAR OUAT-2020 BIOLOGY 133. The foods made from genetically modified crops required 143. Darwin’s finches provide an excellent evidence in favour to pass human testing because of evolution. This evidence comes from the field of A. they may cause allergies A. Biogeography B. they may alter genes B. Anatomy C. they may cause mutations and release toxins C. Embryology D. All of these D. paleontology 134. Aquatic reptiles are 144. Movement of auxin is A. ammonotelic A. Centripetal B. ureotelic B. Basipetal C. ureotelic in water C. Acropetal D. ureotelic over land D. Both B and C 135. Function of iris is to 145. A gene pair hides the effect of another. The phenomenon is A. move lens forward and backward A. epistasis B. dominance B. refract light rays C. mutation D. None of these C. bring about movements of eye lids 146. Radioactive thymidine when added to the medium D. alter the size of pupil surrounding living mammalian cells gets incorporated into the 136. The aquatic fem, which is an excellent biofertilizer,is newly synthesized DNA. Which of the following types of A. Azolla chromatin is expected to become radioactive if cells are exposed B. pteridium radioactive thymidine as soon as they enter the S-phase? C. Salvinia A. Heterochromatin D. Marselia B. Euchromatin 137. In a standard ECG, which one of the following alphabets is C. Both A and B the correct representation of the respective activity of the human D. Neither heterochromatin nor euchromatin but only the heart? nucleous A. R-repolarisation of ventricles 147. Which one of the following is the correct statement B. S-start of systole regarding the particular psychotropic drug specified? C. T-end of diastole A. Hashish causes alter thought perceptions and hallucinations. D. P-depolarisation of the atria B. Opium stimulates nervous system and causes hallucinations. 138. Total number of bones in the hind limb of man is C. Morphine leads to delusions and distribed comolions A. 14 B. 30 C. 24 D. 21 D. Barbiturates cause relaxation and temporary Euphoria 139. The worst environmental hazards were created by 148. Flight muscles of bird are attached to accidents in nuclear power plant and MIC gas tragedy A. clavicle respectively in B. keel of sternum A. Russia in 1990 and Bhopal in 1986 C. scapula B. Ukrain in 1988 and USA in 1984 D. coracoid C. Bhopal in 1984 and Russia in 1990 149. During cleavage, what is TRUE about cells? D. Ukrain in 1986 and Bhopal in 1984 A. Nucleocytoplasmic ratio remains unchanged. 140. Meiosis-II performs B. Size does not increase A. separation of sex chromosomes C. There is less consumption of oxygen B. synthesis of DNA and centromeres D. The division is like meiosis C. separation of homologous chromosomes 150. Pyrenoids are the centres for formation of D. separation of chromatids A. prophyra 141. Sequence of which of the following is used to know the B. enzymes phylogeny? C. fat A. mRNA B. rRNA D. starch C. tRNA D. DNA 151. Modifications by germ line gene therapy are heritable as 142. During which stage, in the complete oxidation of glucose the functional gene is incorporated into are the greatest number of ATP molecules formed from ADP? A. their genome A. glycolysis B. one of the gene B. Kerbs cycle C. somatic cells C. Conversion of pyruvic acid to acetyl Co-A D. All of these D. electron transport chain 152. In soil, water available for roots (to plants) is 1|Page www.bidyasagar.com Plot No-N6/325, Jayadev Vihar, Bhubaneswar 9337421183||0674-2951359  BIDYASAGAR CLASSES, BHUABNESWAR OUAT-2020 A. capillary water A. constant low mutation rate B. hygroscopic water B. large population size C. gravitational water C. highly genetically variable individuals D. chemically bound water D. interbreeding within this population 153. Suppression of reproduction of one type of organism by 163. A deltoid ridge occurs in utilizing some features of its biology or physiology to destroy it A. radius or by use of another organism is known as B. ulna A. Competition C. femur B. Predation D. humerus C. Biological control 164. The contrasting pairs of factors in Mendelian crosses are D. Physiological control called 154. Who discovered plasmodium in RCB of human beings? A. multiple alleles A. Ronald Ross B. allelomorphs B. Mendel C. aliolori C. Laveran D. paramorphs D. Stephen 165. Golgi apparacus is absent in 155. Which one of the following proved effective for biological A. higher plants control of nematodal diseases in plants? B. yeast A. Pisolithus rinctorius C. bacteria and blue-green algae B. Pseudomonas cepacia D. None of these C. Glioclodium virens 166. In general, in the developmental history of a mammalian D. Paecilomyces lilacinus heart, it it observed that it passes through a two-chambered fish 156. Which one belongs to Monera? like heart, three-chambered frog like heart and finally to four- A. Amoeba chambered stage. To which hypothesis can this above cited B. Esherichia statement by approximated? C. Gelidium A. Hardy-Weinberg law D. Spirogyra B. Lamarck’s principle 157. The Taj Mahal is threatened due to the effect of C. Biogenetic law A. Oxygen D. Mendelian principles B. Hydrogen 167. Which is a part of pectoral girdle? C. Chlorine A. Glenoid cavity D. Sulphur dioxide B. Sternum 158. Study of fossils is C. Ilium A. Palaeoncology D. Acetabulum B. Herpetology 168. Due to discovery of which of the following in 1980 the C. Saurology evolution was termed as RNS world? D. Organic evolution A. mRNA, tRNA, rRNA synthesize proteins. 159. A patient suffering from cholera is given saline drip B. In some virus RNA is genetic material. because C. RNA have enzymatic property. A. Cl-ions are important component of blood plasma D. RNA is not found in all calls. B. Na+ions help to retain water in the body 169. Iris is part of C. Na+ions are important in transport of substances across A. sclerotic membrane B. Choroid/uvula D. Cl-ions help in the formation of HCl in stomach for digestion C. choroid and retina 160. Gonads devlop from embryonic D. sclerotic and choroid A. ecoderm 170. Desert plants are generally B. endoderm A. viviparous C. mesoderm B. succulent D. Both B and C C. herbaceous 161. Which of the following cranial nerves can regulate heart D. heterophyllus beat? 171. A condition of failure of kidney to form urine is called A. X B. IX C. VIII D. VII A. deamination 162. Random genetic drift in a population probably results from B. entropy 2|Page www.bidyasagar.com Plot No-N6/325, Jayadev Vihar, Bhubaneswar 9337421183||0674-2951359  BIDYASAGAR CLASSES, BHUABNESWAR OUAT-2020 C. anuria 181. Most diverse macromolecules, found in the cell both D. None of these physically and chemically are 172. In RNA, thymine is replaced by A. proteins A. adenine B. carbohydrates B. guanine C. nucleic acids C. Cytosine D. lipids D. Uracil 182. The population of an insect species shows an explosive 173. A transgenic food crop which may help in solving the increase in numbers during rainy season followed by its problem of night blindness in developing countries is disappearance at the end of the season. What does this show? A. Flavr savr tomatoes A. S-shaped or sigmoid growth of this insect. B. Starling maize B. The food plants mature and die at the end of the rainy season C. Bt soybean C. Its population growth curve is of J-type D. Golden rice D. The population of its predacors increases enormously. 174. Escherichia coli is used extensively in biological research 183. Which is employed for artificial ripening of banana fruits? as it is A. Auxin A. easily cultured B. Cumarin B. easily available C. Ethylene C. easy to handle D. Cytokinin D. easily multiplied in host 184. Home sapiens evolved during 175. Farmers have reported over 50% higher yields of rice by A. Pleistocene B. Oligocene using which of the following biofertilizer? C. Pliocene D. Miocene A. Mycorrhiza 185. In which one of the following do the two names rafer to B. Azolla pinnata one and the same thing? C. Cyanobacteria A. Tricarboxylic acid cycle and Urea cycle D. Legume-Rhizobium symbiosis B. Krebs cycle and Calvin cycle 176. The part of life cycle of malarial parasite plasmodium C. Tricarboxylic acid cycle and citric acid cycle vivax, that is passed in female Anopheles is D. Cirric acid cycle and Calvin cycle A. Sexual cycle 186. Which of the following is a reducing sugar? B. Pre-erythrocytic schizogony A. Galactose C. Exo-erythrocytic schizogony B. Gluconic acid D. Post-erythrocytic schizogony C. β-methyl galactoside 177. The bacteria associated with plant genetic engineering’s D. Sucrose are 187. In plant cells, peroxisomes are associated with A. Salmonella and Pseudomonas A. photorespiration B. Salmonella typhimurium and Agrobacterium B. phototropism C. Bacillus thuringgiensis and Pseudomonas fluorescens 3 C. photoperiodism D. Both B and C D. photosynthesis 178. In plants inulin and pectin are 188. Which of the following plant species you would select for A. reserved food material the production of bioethanol? B. wastes A. Brassica B. Zea mays C. secretory material C. Pongamia D. Jatropha D. Insect attacting material 189. Afferent nerve fibres carry impulses from 179. Middle piece of mammalian sperm possesses A. effector organs to CNS A. mitochondria and centriole B. receptors to CNS B. mitochondria only C. CNS to receptors C. centriole only D. CNS to muscles D. nucleus and mitochondria 190. Bio augmentation is 180. Photoreceptors of earthworm occur on A. the addition of commercially prepared bacterial strain A. clitellum B. production of fertilizers by using bacteria B. many eyes C. the metals are deposited as insoluble oxides and sulphides by C. dorsal surface activities of bacteria D. Lateral sides D. removal of pests 191. Glycogen is a polymer of 3|Page www.bidyasagar.com Plot No-N6/325, Jayadev Vihar, Bhubaneswar 9337421183||0674-2951359  BIDYASAGAR CLASSES, BHUABNESWAR OUAT-2020 A. galactose B. glucose C. in cytoplasm as well as in mitochondria C. fructose D. sucrose D. only on ribosomes attached to the nuclear envelope 192. If the mean and the median pertaining to a certain character 196. Flowering dependent on cold treatment is of a population are of the same value, the following is most A. cryotherapy likely to occur. B. cryogenics A. Normal distribution C. cryoscopy B. Bi-modal distribution D. vernalization C. T-shaped curve 197. Transgenic plants are produced by using Ti plasmids from D. Skewed curve the 193. Choose the correct match: A. Agrobacterium tumefaciens Bladderwort, Sundew, Venusfly trap B. E.coli A. Nepenthes, Diorea, Drosera C. Bacteriophage B. Nepenthes, Utricularia, Vanda D. Agrobacterium varians C. Utricularia, Drosera, Diorea 198. The plant group that produces spores and embryo but lacks D. Diorea, Trapa, Vanda vascular tissues and seeds is 194. One of the following is the correct sequence to make a A. Pteridophyta Transgenic animals. B. Rhodophyta A. Transomics – Transfection - Micro infection - Elctro portion C. Bryophyta – Retroviral vectors D. Phaeophyta B. Micro injection – Transfection - Elctro portion - Retroviral 199. Removal of apical bud results in vectors – Transomics A. formation of new apical bud C. Transfection - Micro injection – Transomics - Elctro portion B. elongation of main stem - Retroviral vectors C. death of plant D. None of these D. formation of lateral branching 195. Protein synthesis in an animal cell takes place 200. In pinus, the pollen grain has 6 chromosomes then its A. Only in the cytoplasm endosperm will have the chromosome B. in the nucleolus as well as in cytoplasm A. 12 B. 18 C. 6 D. 24 ANSWERS 133. A 140. C 147. B 154. B 161. B 168. A 175. B 182. B 189. C 196. A 134. B 141. B 148. A 155. A 162. D 169. B 176. C 183. C 190. A 197. A 135. C 142. D 149. B 156. C 163. A 170. A 177. A 184. B 191. B 198. B 136. B 143. D 150. C 157. B 164. A 171. B 178. A 185. D 192. C 199. A 137. B 144. C 151. D 158. C 165. A 172. D 179. B 186. C 193. A 200. A 138. C 145. D 152. B 159. C 166. A 173. D 180. D 187. A 194. C 139. C 146. C 153. C 160. B 167. A 174. A 181. A 188. C 195. C 4|Page www.bidyasagar.com Plot No-N6/325, Jayadev Vihar, Bhubaneswar 9337421183||0674-2951359