ACT Real Biology Past Paper (1) PDF

DR MAI ABD EL SALAM 00201123056296 1) Which are two organisms that compete on same food? a) Rabbit and fox b) Mouse and grasshopper. c) Hawk and snake. d) Owl and mouse 2) Every DNA molecule replicate as one old strand and one new strand, so DNA replication is described as:...

DR MAI ABD EL SALAM 00201123056296 1) Which are two organisms that compete on same food? a) Rabbit and fox b) Mouse and grasshopper. c) Hawk and snake. d) Owl and mouse 2) Every DNA molecule replicate as one old strand and one new strand, so DNA replication is described as: a) Conservative. b) Semi-conservative. c) Transcribed. d) Translated. 3) DNA mass in gamete compared to mother cell, is: a) The same b) Divided by 2 1  DR MAI ABD EL SALAM 00201123056296 c) Divided by 4 d) Double 4) Number of chromosomes in gametes compared to the mother cell: a) Divided by 2 b) Divided by 4 c) Same d) Doubled 5) Scientists found fossils of an animal in different continents that are now separated, what is the reason? a) The animal roamed around in all continents that were once joined. b) Animal migrates. c) Someone spread the fossils d) Unknown 2  DR MAI ABD EL SALAM 00201123056296 6) We have 2 plants with height of 10 meters, 3 plants with a hight of 15 m, 2 plants with 20 m, 3 plants with 25 m. what is the average hight of plants? a) 18 b) 20 c) 25 d) 30 7) How many alleles are expressed by codominant inheritance? a) 1 b) 2 c) 3 d) 4 8) Which best describes meiosis? a) 1 round of cell division result in 2 diploid cells. b) 1 round of cell division result in 4 diploid cells. c) 2 round of cell divisions result in 2 haploid cells. d) 2 round of cell divisions result in 4 haploid cells. 9) Which structure is not correctly paired with its function? a) Ribosome – protein synthesis b) Mitochondria – energy production. c) Golgi body – protein packing. d) Centrioles – genetic information. 10) A specific plant toxin often harms animal that eat the plant. Cell organelle that stores the toxin: a) chloroplast 3  DR MAI ABD EL SALAM 00201123056296 b) vacuole c) ribosome. d) Mitochondria 11) A volcano destroyed a forest, then soil started to form, followed by plants and animals. The process is: a) Progression. b) Primary succession. c) Secondary succession d) Biomagnification. 12) How cell in one organism can differentiate in function and structure? a) They have different genes. b) They have same genes, but certain genes are expressed. c) The have different organelles. d) The have different enzymes 13) Haemophilic father and normal and not carrier mother has 2 boys and 2 girls. Which of their offspring will most likely inherit the allele for disease? a) All daughters b) All sons c) Half daughters d) Half sons. 14) In vascular plants, which of the following terms best describe the structure of vascular system that transports sugar and other organic compounds through the plant? 4  DR MAI ABD EL SALAM 00201123056296 a) Phloem b) Xylem. c) Cambium. d) Pith. 15) Birds with large beaks and birds with small beaks are widespread in the environment, while middle-sized beaks are in intermediate amounts. Type of natural selection: a) Disruptive selection. b) Directional selection. c) Stabilizing selection. d) Convergent selection. 16) Organism A can only survive, organism B survive and reproduce, organism C have long life span, organism D is the strongest. Which of the following is most fit according to Darwin? a) A b) B c) C d) D 17) Two genes will most likely assort independently of each other if they are located on: a) An X chromosome b) Codominant chromosome c) a Y chromosome d) Non homologous chromosomes 18) Less genetic variation in population cause: 5  DR MAI ABD EL SALAM 00201123056296 a) Less chances of survival. b) More chances of survival. c) More adaptation. d) No change. 19) Plants and cyanobacteria are photosynthetic organisms, how do the student know if that organism is plant or cyanobacteria? a) Plant cells have nucleus, cyanobacteria do not have nucleus. b) Plant cells have chlorophyll, but cyanobacteria do not have. c) Cyanobacteria have cell wall, but plant do not have. d) Cyanobacteria have ribosome, but plant do not have. 20) Space between neurons is called: a) Synapse. b) Sarcomere. c) Dendrites d) Terminals. 21) How do organic compounds and inorganic compounds differ from each other? a) Organic compounds always have carbon and hydrogen. b) Inorganic compounds always have covalent bonds. c) Organic compounds always have ionic bonds. 6  DR MAI ABD EL SALAM 00201123056296 d) Inorganic compounds always have ionic bonds. 22) Some molecules travel through cell membrane against concentration gradient, this type of transport called: a) Passive transport. b) Osmosis. c) Active transport. d) Pinocytosis. 23) Hawks eat snakes, snakes eat frogs, and frogs eat grasshoppers. What is relationship between these organisms? a) Competition. b) Predation. c) Mutualism. d) Commensalism. 24) Why does the Animal cell that placed in distilled water lysis? a) Water flow into the cell. b) Water flow out of the cell. c) Solute flow out of the cell. d) Solute flow into the cell. 25) In which phase of Meiosis is the centromere split and chromatids separated? a) Anaphase I b) Anaphase II c) Metaphase I d) Metaphase II 7  DR MAI ABD EL SALAM 00201123056296 26) What is the function of white blood cells? a) Carry oxygen b) Carry carbon dioxide c) Detoxify the blood. d) Fight infections. 27) What is the neutral subatomic particle that placed inside the nucleus of atom? a) Protons. b) Electrons. c) Neutrons. d) Energy levels. 28) What is the unit that used to measure the weight of small organisms? a) Meter. b) Kilometre. c) Gram. d) Kilogram. 29) Why light independent reaction cannot happen in dark? a) It depends on NADH and FADH2 produced by light reaction. b) It depends on NADH and ATP produced by light reaction. c) It depends on FADH2 and ATP produced by light reaction. d) It depends on NADPH and ATP produced by light reaction. 8  DR MAI ABD EL SALAM 00201123056296 30) Two organisms that live in same place and eat same food but do not compete, because they have different: a) Size b) Shape c) Structure d) Ecological niche 31) All populations that interact with each other is called: a) Ecosystem. b) Biome. c) Community. d) Biosphere 32) Carotene is a pigment in carrots, and other vegetables that appear orange. What true about carotene? a) It strongly absorbs both blue -green and yellow orange light b) It strongly absorbs blue-green light but does not strongly absorb yellow-orange color. c) It does not strongly absorb blue-green light but strongly absorbs yellow-orange light. d) It strongly absorbs neither blue-green nor yellow- orange light. 33) Structures of Substance A, and substance B are slightly different. An enzyme binds to substance A only. because: a) Active site of enzyme fit better with A b) Allosteric site of enzyme binds with A. c) Binding site of enzyme fit with A 9  DR MAI ABD EL SALAM 00201123056296 d) Regulatory site of enzyme fit with A. 34) Short microtubule that is found in paramecium in great number: a) Flagella b) Cilia c) Sarcomere d) Actin 35) Nucleic acid that is involved in transcription, but not involved in translation: a) DNA b) Messenger RNA c) Transfer RNA d) Ribosomal RNA 36) The macromolecule that is the building block of cell membrane: a) Protein. b) Lipid c) Carbohydrate d) Nucleic acid. 37) Scientist need to know the effect of different concentrations of auxin hormone on plant growth, what is the control sample? a) 0% auxin b) 10% auxin c) 20% auxin d) 30% auxin 10  DR MAI ABD EL SALAM 00201123056296 38) Small bilaterally symmetric adult animal that is segmented, and has chitinous exoskeleton, and joined appendage is: a) Chordate b) Echinodermata c) Molluscs d) arthropods. 39) to measure the rate of respiration of fungi in different temperatures, we put: a) 10 fungi in fresh water at 15 C and 10 fungi in freshwater at 25 C b) 10 fungi in freshwater at 15 C, and 10 fungi un saltwater at 25 C. c) 10 trouts in freshwater at 15 C, and 10 fungi in freshwater at 25 C. d) 10 trouts in freshwater at 15 C, and 10 fungi in salt water at 25 C. 40) In double strand nucleic acid, the hydrogen bond is formed between which of these? a) Amino groups. b) Sugars. c) Nitrogenous bases. d) Phosphate groups. 41) which of the following statements about cell structure is NOT correct? a) Plant cells have cell walls, whereas animal cells do not. 11  DR MAI ABD EL SALAM 00201123056296 b) Ribosome are the main sites of energy production for the cell. c) Plant cells have chloroplasts, whereas animal cells do not. d) Lysosomes function in the digestion of cellular waste products. 42) pH of some substances: Fatty acid 1 Lemon juice 2 vinegar 3 rain 5.5 milk 6.5 Sea water 8.5 ammonia 12 lye 13 which of the following statement accurately compares rain to another substance in the table? a) rain has a higher hydroxide ion concentration than ammonia b) rain has a higher hydroxide ion concentration than milk c) rain has a higher hydroxide ion concentration than vinegar 12  DR MAI ABD EL SALAM 00201123056296 d) rain has a higher hydroxide ion concentration than lye 43) Phoebes Leven proposed that DNA contain an equal amount of each nitrogenous base, an organized in repeating clusters. Which of the following statement is true? a) DNA contain equal amounts of each adenine, cytosine, guanine, and thymine. b) DNA contain an equal amount of adenine and guanine, and equal amount of thymine and cytosine. c) DNA contain an equal amount of adenine and cytosine, and equal amounts of thiamine and guanine. d) DNA contain an equal amount of adenine and thymine, and equal amounts of guanine and cytosine. 44) what would happen to a human red blood cell if placed in distilled water? a) It would shrivel. b) it would plasmolysis. c) it would lyse. d) it would not be affected. 45) which of the following pairs does not represent correct relationship: a) fatty acid; lipid b) starch; polysaccharide 13  DR MAI ABD EL SALAM 00201123056296 c) starch; carbohydrate d) enzyme; lipid 46) which of the following statements is correct? a) The product of transcription is DNA. b) The product of transcription is mRNA. c) The product of transcription is a polypeptide. d) The product of translation is mRNA. 47) Which of the following statements about meiosis is correct? a) The result of meiosis is a zygote. b) Only somatic cells undergo meiosis. c) Meiosis typically results in genetic variation among the gamete produced. d) The products of meiosis are always four cells identical to the parent cell 48) An animal organism with a diploid number of chromosomes equal to 30 would normally a) produce two gametes with 30 chromosomes each during meiosis. b) produce four gametes with 30 chromosomes each during meiosis. c) produce two gametes with 15 chromosomes each during meiosis. d) Produce four gametes with15 chromosomes each during meiosis. 49) which of the following is true about enzymes? a) They always work alone. b) They are consumed in a reaction. c) They are amino acid polymers. 14  DR MAI ABD EL SALAM 00201123056296 d) They always require a coenzyme. 50) The Calvin cycle of photosynthesis takes place in: a) Stroma b) Thylakoid c) Vacuole d) stomata 51) A student designed an experiment to determine the effect of using fretwork on plant growth. For 4 weeks, the student grew 20 plants. 10 using a fretwork and 10 without using a fretwork. The student then measured the height of each plant. What was the dependent variable in this experiment? a) Number of plants with a fretwork. b) Length of time plants grew. c) height of plants. d) Presence or absence of a fretwork. 52) which element act as a final electron acceptor during aerobic respiration? a) Hydrogen b) Carbon c) Nitrogen d) oxygen 53) Select the correct sequence for human circulation. a) heart—vein—capillary—artery—heart b) heart—artery—lung—vein—body systems—heart 15  DR MAI ABD EL SALAM 00201123056296 c) heart—artery—lungs—vein—heart—body systems d) body system—lungs—heart—vein— capillary—artery 54) which of the following tissues contain the highest number of mitochondria? a) nervous b) skin c) connective d) muscle 55) Which of the following is found in all viruses? a) protein coat b) cell membrane c) membrane-bound organelles d) endoplasmic reticulum 56) The plant hormone responsible for fruit ripening is a) abscisic acid. b) auxin. c) cytokinin. d) Ethylene 57) The misuse of antibiotics contributes to the spread of resistant strains of bacteria. The misuse of antibiotics can result in: a) The transfer of nuclei from bacteria to viruses. b) The transfer of nuclei from viruses to bacteria. 16  DR MAI ABD EL SALAM 00201123056296 c) A decrease in the frequency of antibiotic resistance genes in a population of bacteria. d) An increase in the frequency of antibiotic resistance allele in a population of bacteria. 58) Which of the following describe a fundamental characteristic of all living organisms? a) Genetic mutations arise in response to environmental changes. b) Inheritance of traits is based on a universal genetic code. c) Individual organisms can be identified by microscopic cellular examination. d) Cells are interchangeable between members of the same species. 59) Damage to the Golgi apparatus will most have which of the following cellular consequences: a) Transcription will be limited to cytoplasmic vesicles of the damaged cells b) Translation will be limited within cytoplasmic vesicles of the damaged cells c) Protein products will be modified for use inside the damaged cells. 17  DR MAI ABD EL SALAM 00201123056296 d) Protein products will not be secreted from the damaged cells. 60) Which property allows the interaction between water molecules in the xylem vessels of plants, contributing to their movement up these vessels? a) high hear capacity b) high heat of vaporization c) Cohesion d) Adhesion 61) Which compound is released in a dehydration reaction? a) CO2 b) H2O c) CH4 d) C6H6O6 62) there are membranous disk structures stacked on top of each other, and which are found in plastids. a) Stroma. b) Cristae c) Grana d) Leucoplasts 63) Which of the following is an example of enzyme cofactor? a) Vitamin D b) Iron 18  DR MAI ABD EL SALAM 00201123056296 c) ATP d) ADP 64) What is the site that Glycolysis takes place? a) Cytoplasm b) Mitochondria c) Stroma d) Grana 65) Which of the following is considered as an exocrine and an endocrine gland? a)Spleen b) Pancreas c) Colon d)Stomach 66) which of following is considered accessory organ? a) Pancreas b) Stomach c) Colon d) Stomach 67) What happened when N atom changed to N+? a) lost electron b) gained electron c) shared electron d) no change happened 68) What's the role of flagella? a) Propulsion 19  DR MAI ABD EL SALAM 00201123056296 b) cell division c) protein synthesis d) Photosynthesis 69) Which of the following is the correct aerobic cellular respiration equation? a) C6H12O6+6O2 6CO2 +6H2O +36 ATP b) C5H12O5 + 6O2 6CO2 + 36 ATP c) 6CO2 + 6H2O C6H12O6 + 6O2 d) 6C3H6O3 + O2 6CO2 +6C2H50H 70) Which of the following muscles acts involuntary? a) striated skeletal muscle b) striated smooth muscle c) striated cardiac muscle d) unstrained skeletal muscle 71) Which of the following cells cover the body surface and lines body cavity? a) epithelial tissue b) neurons c) muscular tissue d) connective tissue 72) which of these molecules is considered an organic matter? a) H20 b) C6H12O6 c) NaCL 20  DR MAI ABD EL SALAM 00201123056296 d) C6H12O6 + NaCL 73) which of the following is a conclusion obtained from Griffiths experiment? a) Transformation in bacteria b) conjugation in bacteria c) Transduction in bacteria d) Mutation in bacteria 74) what is the function of ribosomes? a) cell division b) protein synthesis c) locomotion d) cellular respiration 75) Which of the following is proposed by Watson and crick model of DNA molecule? a) its replication is semi-conservative b) its structure is double helix c) it's formed from amino acids d) it's transcription results to production of RNA 76) Peptide bond is found between a) amino acids b) nucleic acid c) monosaccharides d) fatty acids. 77) Protons and neutrons are found in the atom a) the neutrons are positive and inside the nucleus 21  DR MAI ABD EL SALAM 00201123056296 b) the protons are negative and outside the nucleus c) the neutrons have no charge and inside the nucleus d) the protons are positive and outside the nucleus 78) which of the following figure represent the non- disjunction process? A) B) C) D) 79) Apoptosis is one of the functions of a) ribosomes 22  DR MAI ABD EL SALAM 00201123056296 b) centrosomes c) lysosome d) Mitochondria 80) which of the following is true regarding Photosynthesis? a) light dependent reaction depends on the products from light independent reaction b) light independent depends on the products from light dependent c) light Independent occurs at night d) it occurs through only one species. 81) What is common in mitochondria and endoplasmic reticulum membrane? a) ATP b) Lipids c) Proteins d) Starch 82) We shall consider theory of endosymbiosis to be true because these organelles have their own a) ATP b) DNA c) Protein d) Starch 83) Phagocytes and lymphocytes are types of a) red blood cells b) white blood cells c) platelets d) Plasma 23  DR MAI ABD EL SALAM 00201123056296 84) What is the scientific meaning of biological evolution? a) The development of an organism during its life time b) The change in inherited traits over successive generations in population of species c) The increase in the concentration of harmful chemicals in each trophic level. d) The use of living organisms to control pests 85) which of following could happen from a nondisjunction in homologous chromosomes? a) All cells will have an extra chromosome b) half of the cells will have an extra chromosome c) All of the cells will lose a chromosome d) one-quarter will have an extra chromosome 86) which of the following will be LEAST affected by a mutation in the DNA sequence? a) The ability of the DNA to replicate b) The translation of mRNA into proteins c) The transcription of DNA into mRNA d) The chosen anticodon of the tRNA 87) Mammals …… 24  DR MAI ABD EL SALAM 00201123056296 a) have open circulatory system because blood flows freely through cavities since there are no vessels to conduct the blood b) have open circulatory system because blood pumped into a hemocoel cavity c) have closed circulatory system because heart pumps blood through vessels that are separate from the interstitial fluid of the body. d) have closed circulatory system because blood mixes with interstitial fluid at the cellular level. 88) what will happen when ATP is utilized? a) the bond between 2nd and 3rd phosphate is broken b) the bond between 1 st and 2nd phosphate is broken c) energy is restored d) 3rd phosphate group linked to 2nd phosphate group 89) What's common between the stomata in the lower epidermis and alveoli in the lungs? a) gas exchange b) ATP production c) Photosynthesis d) cellular respiration 90) What bonds forms when electrons are shared? 25  DR MAI ABD EL SALAM 00201123056296 a) covalent bond b) ionic bond c) metallic bond d) hydrogen bond 91) Lions and hyenas, living in the same area, both eat Buffalos. What is the most probably the relationship in the lions and the hyena’s community? I. Lions and hyenas will compete on the buffalo II. lions will compete with each other on the Buffalo III. hyenas will compete with each other on the Buffalo IV. No competition will occur between lions and hyenas as they're different species The correct consequence? a) I only b) Il and Ill only c) IV only d) I, ll, and Ill 92) Two students conducted an experiment to determine what happens to the energy transferred from each consecutive trophic level. Which of the following conclusions represented by the student is correct? a) student A suggested that energy is lost during cellular respiration 26  DR MAI ABD EL SALAM 00201123056296 b) student B suggested that energy is lost through animal faeces c) both students have correct conclusions d) Neither student have correct conclusions 93) Which of the following is correct about the number of protons, electrons and neutrons in carbon 13? a) 6 protons, 6 electrons, 6 neutrons b) 6 protons, 6 electrons, 7 neutrons c) 5 protons, 5 electrons, 8 neutrons d) 5 protons, 5 electrons, 5 neutrons 94) according to the 4 classifications of plants. What will help to determine what type of plant it is? I) cell wall II) flowers. III) seeds a) I only. b) I and II. c) II and III. d) I, II, and III. 95) Which statements describes the difference between bacteria and viruses? a) Bacteria do not have DNA but viruses do b) Viruses can infect humans but bacteria cannot. 27  DR MAI ABD EL SALAM 00201123056296 c) Bacteria have a membrane bound nucleus but viruses do not. d) Viruses are acellular but bacteria are not. 96) Which of the following is true regarding the similarities between Fins of shark and fins of dolphin? a) evidence of common ancestors b) evidence of convergent evolution c) share homologous structures d) share vestigial structures 97) What is the difference between cilia and flagella? a) cilia is shorter and greater in number b) cilia is longer and less In number c) both have same length and number d) no difference in number and length between them 98) a scientist put 4 artificial flowers with the same shape and height but with different colors in a box contain honeybees. Then count the number of honeybees that landed on each flower. What question was he trying to answer in the experiment? a) would bees land on real or artificial flower? b) does the height of flower affect the land of bees? c) does the shape of flower affect the landing of the bees? d) does the color of flower affect the landing of the bees? 28  DR MAI ABD EL SALAM 00201123056296 99) A student hypothesized that the yeast cells put in a solution would absorb all nutrients and stop dividing after 10 hr. then he concludes the data of the experiment in table: hours Cell density(cells/ml) 6 4000 8 6000 10 8000 12 11000 14 24000 Was the student’s hypothesis correct? a) No, the cell density remain constant. b) No, the cell density increased after 10 hours.. c) Yes, the cell density remain constant. d) Yes, the cell density increased after 10 hours. 100) Scientists have observed that the gene that codes for RNA polymerase is present in all living species and that there are few differences between species in the DNA sequence that code for RNA polymerase. Which of the following statements provides the most likely explanation for the observation? a) Similarities in RNA polymerase resulted from non- random mating. b) The common ancestor of all organisms had RNA polymerase c) Convergent evolution led to similarities in RNA polymerase. 29 DR MAI ABD EL SALAM 00201123056296 d) The RNA polymerase gene does not mutate. 30