BIOLOGY REMEDIAL EXAM (2).pdf

BOOKLET CODE: 02 SUBJECT CODE: O5 NUMBER OF ITEMS: 70 TIME ALLOWED: 1.45 HOURS GENERAL DIRECTIONS THIS BOOKLET CONTAINS BIOLOGY REMEDIAL EXAMINATION. THE SUBJECT CODE FOR THIS EXAMINATION IS 05 AND THE CODE FOR THIS PARTICULAR...

BOOKLET CODE: 02 SUBJECT CODE: O5 NUMBER OF ITEMS: 70 TIME ALLOWED: 1.45 HOURS GENERAL DIRECTIONS THIS BOOKLET CONTAINS BIOLOGY REMEDIAL EXAMINATION. THE SUBJECT CODE FOR THIS EXAMINATION IS 05 AND THE CODE FOR THIS PARTICULAR BOOKLET IS 05 PLEASE COPY THESE CODES ON YOUR ANSWER SHEETWHERE IT READS BOOKLET CODE AND SUBJECT CODE. THEN, BLACKEN THE CORRESPONDING BOXES IN THE COLUMNS BELOW EACH NUMBER. IN THIS EXAMINATION, THERE ARE A TOTAL OF 70 MULTIPLE CHOICE ITEMS. ATTEMPT ALL THE ITEMS. YOU WILL BE ALLOWED TO WORK FOR 1.45 HOURS. IF YOU FINISH BEFORE TIME IS CALLED, YOUMAY GO BACK AND REVIEW. WHEN TIME IS CALLED, YOU MUST IMMEDIATELY STOP WORKING, LAY YOUR PENCILDOWN, AND WAIT FOR FURTHER INSTRUCTIONS. ANY FORM OF CHEATING OR AN ATTEMPT TO CHEAT IN THE EXAMINATION HALL WILL RESULT IN AN UTOMATIC DISMISSAL FROM THE EXAMINATION HALL AND CANCELLATION OF YOURSCORE(S). DIRECTIONS: Each of the following questions is followed by four possible alternatives. Read each question carefully and blacken the letter of your choice on the separate answer sheet provided. 1. All of the following are values that everyone has to develop for the fight against HIV Except. A. Self esteems involving self confidence C. Homosexuality B. Respect and care for others D. responsible sexual behavior 2. It is true to say that;- A. All bacteria are parasite B. flagella is the characteristic of all bacteria C. All bacteria have cell wall D. All bacteria have external membrane outside peptidoglycan cell wall 3. Which of the pieces of equipment do biologists use to sterilize objects? 1  A. Water bath B. Incubator C. Centrifuge D. Autoclave 4. In genetic engineering, which one of the following is used to stitch the gene into another DNA molecule? A. Plasmid B. Restriction endonuclase C. Ligase D. Polymerase 5. The first step of scientific method involves;- A. Performing an experiment C. Forming a hypothesis B. Making observation D. Predicting the result of the experiment 6. All of the following ways are the role of antiretroviral drug to reduce the spread of HIV within a person Except A. Block enzyme involved in the entry phase C. Block reverse transcription B. Activate assembly of virus particles D. Block protein synthesis 7. Which one the following biological equipment is useful in biology laboratory? A. Petridishes B. Theodolite C. Plant press D. Pitfall traps 8. Viruses differ from other cellular organisms in that viruses are;- A. Look posses cellular organelles C. Have circular DNA B. Presence of genetic materials D. Reproduce inside the host 9. The minimum distance of which a microscope is capable of distinguishing two points as separate is its:- A. Staining B. Mounting C. Resolving power D. Magnification 10. A very strong structural molecule in plants is formed by hydrogen bonding between chains of glucose molecule is; A. Wax B. Starch C. Cellulose D. Glycogen 11. What colour do gram-negative bacteria stain with gram’s stain? A. Purple B. White C. Pink D. Red 12. Among the following organisms, which one belongs to Eukaryotes? A. Stereptoccus B. Blue green algae C. Bacilli D. Paramecium 13. Which one of the following elements is found in protein and nucleic acids but does not occur in carbohydrates? A. Hydrogen B. Nitrogen C. Oxygen D. Carbon 14. Lipids are distinguished from other organic molecules because they;- A. Form large protein molecules C. Do not dissolve in water B. Dissolve easily in water D. Contain carbon, hydrogen and oxygen 15. Both parasitic and saprophytic life is found in; A. Fungi and Virus B. Protozoa and fungi C. Algae and fungi D. Bacteria and fungi 16. All of the following used as a vector to transfer a particular gene from donor to receiver Except A. Ligase B. Plasmid C. Gene gun D. Agro bacterium 17. Which level of a protein structural organization is represented by its amino acid sequence? 2  A. Primary structure C. Secondary structure B. Tertiary structure D. Quaternary structure 18. Suppose a double strand DNA molecule consisting of 1200 bases contains 200 cytosine, the number of the rest bases would be ; A. 200 adenine, 400 guanine, 400 thymine C. 400 guanine, 200thymine, 400adenine B. 200 guanine, 400 adenine, 400 thymine D. 400guanine, 400adenine, 400thymine 19. Which group of microorganism causes the disease known as sleeping sickness? A. Protozoa B. Virus C. Fungi D. Bacteria 20. Suppose a fossil initially contains 100,000 atoms of a certain radioactive element whose half-life is 10,000 years, after how many years would be the number of the atoms is 12,500? A. 10,000 years B. 20,000 years C. 40,000 years D. 30,000 years 21. Which one of the following biological laboratory equipment does not included in dissection kit? A. Scissors B. Dropper C. Scalpel D. Forceps 22. Which of the following is true about the dark (light independent) reaction of photosynthesis? A. It occurs in the grana of the chloroplast B. Formation of NADPH and ATP C. Carbon dioxide and hydrogen are combined to form glucose D. Water molecule are split into hydrogen and oxygen 23. In DNA molecule the “up-rights” of the ladder are made up of ; A. Sugar and phosphate C. Organic base and phosphate B. Sugar and organic base D. Organic bases 24. What is the best term that refers to maximum number of individuals that a given environment can support over a long period of time without degradation? A. Climax community B. Lag phase C. Carrying capacity D. Density 25. Inter-specific competition is : A. Competition between members of the same species in the same ecosystem B. Competition between members of the same species in the same habitat C. Competition between members of different species in the same ecosystem D. Competition between members of different species in the same habitat 26. What is the name of the process in which mRNA code converted into polypeptide chain? A. Transduction B. Translocation C. Translation D. Transcription 27. One of the following traits is a dominant character in Mendlian experiment? A. Terminal B. Short C. Purple D. Wrinkled 3 28. Which of the following is an example that shows the significance of biotechnology? A. Using dung to fertilize the soil B. Using genetic engineering to improve plant growth C. Digging large holes to conserve rain water D. Building terrace to minimize soil erosion 29. What is the process called when a virus carries the plasmid from one to another cell to exchange their genetic information? A. Transduction B. Conjugation C. Co-transformation D. Transformation 30. The polysaccharide that act as strengthening material of bacterial cell wall is; A. Cellulose B. Peptidoglycan C. Chitin D. Starch 31. What term is used to describe the chemical process of living organisms that involves both joining up of monomers to produce polymers and the splitting of polymers to monomers? A. Catabolism B. Anabolism C. Polymorphism D. Metabolism 32. Which one of the following property of genetic code that best defines the genetic code for a specific amino acid similar to all kinds of organism? A. Triplet code B. Universal code C. Non overlapping code D. Degenerate code 33. The mutation created when chromatids do not segregate successfully is; A. Inversion B. Duplication C. Non disjunction D. Point mutation 34. Which one of the following is not the component of Stanley miller’s spark discharge of experiment? A. Methane B. Water C. Carbon monoxide D. Ammonia 35. Among the following characteristic, which one makes Drosophila (fruit fly) are convenient Experimental animal? A. They are big animal with long life cycle B. They are expensive and complex to bread C. They have only four pairs of chromosomes per cell D. The chromosomes small 36. Which one of the following is different from the rest? A. Sex cell B. Gamete C. Zygote D. Reproductive cell 37. Which of the following is the most abundant polysaccharide found in animals? A. Glycogen B. Sucrose C. Cellulose D. Starch 38. Which one of the following is true? A. Homologues chromosome carry alleles of the same genes at different loci B. Same allele are Co dominant; both alleles are expressed in the homozygote C. Dominant alleles are expressed in homozygote and in the heterozygote 4  D. Genes are different version of alleles 39. What is the name of the energy needed for protein synthesis? A. ATP B. ADP C. CTP D. GTP 40. Which process of chromosomal mutation is held responsible for chronic myelogenous leukemia? A. Translation B. Translocation C. Transcription D. Duplication 41. Two parents of genotype Aa are crossed breed, The alleles show complete dominance. What proportion of the offspring will phenotypically look their parents? A. ¼ B. 0 C. ¾ D. ½ 42. In the process of preparing genetic fingerprints, which one of the following comes first before all others? A. Radioactive labeling C. Blotting B. Autoradiography D. Gel electrophoresis 43. When an enzyme is denatured by temperature or an extreme PH, which one of does it lost? A. Peptide bond B. Primary structure C. Tertiary structure D. Secondary structure 44. Which alternative correctly matches the polymer with its monomer? A. Carbohydrate----fatty acids C. Nucleic acid-----nucleotides B. Lipids -----amino acids and glycerol D. Protein -------monosaccharides 45. The basic difference between Lamarckism and Darwinism is that;- A. Outcome of evolution C. Mechanism of evolution B. Existence of evolution D. Presence of variation 46. Allopatric speciation is;- A. Reproduction during different season C. Different courtship in mating period B. Involving geographical separation D. Reproduction at different time of a day 47. Suppose two related animal cannot interbreed because they become active at different times of the day. This is;- A. Seasonal isolation C. Behavioral isolation B. Habitat isolation D. Temporal isolation 48. The presence of lipid in food is tested by;- A. Biuret test B. Emulsion test C. Iodine test D. Benedict’s test 49. During protein synthesis, which of the following molecules transports amino acids to their correct positions in the group chains of polypeptide? A. mRNA B. tRNA C. rRNA D. Deoxyribonucleic acid 50. If an enzyme provided with its normal substrate plus another molecule having the same shape and size as the substrate which one of the following would happen? A. End product inhibition C. Competitive inhibition 5  B. Allosteric inhibition D. Non-competitive inhibition 51. In which of the following organic compounds can protease and lactase be grouped? A. Nucleic acids B. Carbohydrates C. Hormones D. Enzymes 52. Which one of the following is not the function of RNA molecules? A. Transport amino acids C. Carries instructions from DNA to RNA B. Self--replicable D. Structural components for ribosome’s 53. Enzymes are specific to only one kind of reactions because: A. Enzymes are biological catalysts C. Enzymes may affected by several factors B. Enzymes can be reused D. Each enzymes have unique shape 54. From evolution point of view, which of the following animal is expected to have hemoglobin protein are the least similar to that of human? A. Dog B. Frog C. Macaque D. Lamprey 55. Which of the lists include type 1 fossils? A. Bone fragments, teeth fragment, plant body impression, hair B. Foot print, stone tools, coprolite, bone fragment C. Bone remains, teeth fragment, leaf, coprolite, hair D. Bone, teeth, skin impression, seed, foot print, coprolite 56. To overcome an energy barrier between reactants and products in a chemical reaction, energy must be provided to get the reaction started, this energy is: A. Activation energy B. Kinetic energy C. Initiation energy D. Reaction energy 57. Which of the following is the correct step in fossilization process? A. Death, perminiralization, exposure, sedimentation B. Death, sedimentation, uplift, perminiralization C. Death, perminiralization, sedimentation, exposure D. Death, sedimentation, perminiralization, exposure 58. All of the following is true about protein synthesis in eukaryotic organism Except A. mRNA are modified before leaving the nucleus C. Transcription occur in the nucleus B. Transcription and translation are coupled D. Transcription and translation are separated 59. Among the following proteins, which one belongs to control the plasma glucose concentration? A. Structural B. Antibody C. Antigen D. Peptide hormone 60. Mr Abebe is an albino but his wife Azeb is not, they are expecting to have a baby, if the baby is an albino, what is the possible genotype of Azeb? 6  A. aa B. Aa C. A D. AA 61. If due to incomplete dominance, the F1 plant from a cross of red flower with white flower parents are pink, which of the following ratios are expected in the F2 generation? A. 3 red, 1 pink, 1 white C. 2 red, 1 pink, 1 white B. 1 red, 1 pink, 1 white D. 1 red, 2 pink, 1 white 62. Which of the following is related to the theory of Lamarck? A. Evolution is the result of struggle for existence B. If not controlled, human population growth exceed food supply C. Evolution is based on the use and disuse of body parts D. Individuals in a species show variation in their characteristics 63. Which of the following is incorrect about stratography? A. Strata at the bottom layer are newly created than others B. Lower strata contains older fossils C. As strata gets deeper fossil age increase D. Strata at the top layers contain recent fossils 64. Enzymes are important biological catalysts because they:- A. Lower the entropy of the biochemical reaction B. Increase the free energy of a biochemical reaction C. Lower the activation energy of a biochemical reaction D. Supply the energy to initiate a biochemical reaction 65. Which of the following belongs to the category of heterotrophic? A. Blue green algae B. Fungi C. Ferns D. Higher plants 66. Which of the following variable is least likely to affect an enzymes rate of reaction? A. PH value B. CO2 concentration C. Temperature D. Concentration of substrate 67. When trying to view an object under the microscope and after switching to the high power objective, which knobs do you in order to see a clear picture? A. The arm of the microscope C. The course adjustment B. The fine adjustment D. The middle adjustment 68. Which of the following organelles are likely to be more abundant in active cells such as the muscles of the human heart? A. Chromosomes B. Lysosomes C. Mitochondria D. Golgi-bodies 69. Which of the following pairs are both organelles concerned with energy transformation? A. Vacuole and chloroplast C. Mitochondria and chloroplast B. Mitochondria and nucleus D. Chloroplast and nucleus 7 70. Which one of the following is different from the rest? A. Substitution B. Inversion C. Addition D. Deletion 8