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[Audio] JOINT UNIVERSITIES PRELIMINARY EXAMINATIONS BOARD 2015 EXAMINATIONS BIOLOGY: SCI-J152 MULTIPLE CHOICE QUESTIONS Answer ALL Questions 1. Which of the following diseases could be exclusively associated with a river basin? A. Malaria B. Syphilis C. Onchocerciasis D. Cholera 2. In mammals, the function of the sebaceous gland is to ________________ A. produce sweat B. secrete sodium C. secrete water D. produce sebum 3. Osteoporosis is a disease of the ___________________ A. lungs B. skin C. bones D. eyes 4. The type of reproduction that is common to both Hydra and yeast is _______________ A. grafting B. budding C. conjugation D. binary fission 5. The difference between the largest and the smallest data values is the ______________ A. variance B. interquartile range C. range D. coefficient of variation 6. The function of ribosomes in cells is A. protein synthesis B. starch synthesis C. transport of materials D. lipid storage..

[Audio] 7. Which statement correctly describes homologous chromosomes? A. They are formed during meiosis B. They are held together by centromeres C. They are identical D. They carry the same gene loci 8. Which one of the following is a correct outline of the main events in photosynthesis? A. Oxygen reacts with a carbohydrate to produce water and carbon-dioxide in the presence of light. B. Light join carbon-dioxide to an acceptor compound which is then reduced by hydrogen obtained from water. C. Light splits water and the resulting hydroxyl group combines with a compound which has incorporated carbon-dioxide D. Carbon-dioxide combines with an acceptor compound and this is reduced by hydrogen split from water by light. 9. Breathing movement in mammals is accompanied by regular movement of the diaphragm and the ____________________ A. intercostal muscles B. vertebral column C. clavicle D. pleural cavity 10. Organisms that require oxygen to grow are called ___________________ A. psychrophilic organisms B. thermophilic organisms C. aerobes D. hyperthermophiles. 11. Organisms that retain the blue/purple colour in their cell wall in gram staining technique are _____________________ A. microaerophile B. viable cells C. gram positive organisms D. gram negative organisms. 12. Which of the following nitrogenous base is found in RNA but not in DNA? A. Adenine B. Thymine C. Uracil D. Guanine. 13. The study of groups of organisms is called ____________ A. Ecology B. Autecology.

[Audio] C. Gynecology D. Synecology 14. Genetic rearrangement between nonsister chromatids is known as _____________ A. cross over B. synapsis C. random fertilization D. character 15. One of the following is not a type of dormancy. A. Induced B. Innate C. Enforced D. Applied 16. The terrestrial species of class Gastropoda prevent water loss by means of _______ A. Apiphragm. B. Nephridia. C. Radula. D. Epiphragm. 17. The first forms of life on Earth were thought to be ____________ A. single-celled plants. B. prokaryotes C. insects D. large animals such as dinosaurs 18. Which polysaccharide is usually found in the cell walls of fungi? A. Starch B. Glycogen C. Chitin D. Cellulose 19. What adaptation do seed plants have in addition to the seed that is not found in seedless plants? A. Gametophytes B. Vascular tissue C. Pollen D. Chlorophyll 20. Prokaryotes stain as Gram-positive or Gramnegative because of differences in the ____________ A. Cell wall. B. Cytoplasm..

[Audio] C. Nucleus. D. Chromosome. 21. External fertilization occurs in ______________ type of environment? A. Aquatic B. Forested C. Savanna D. Steppe 22. What kind of ecosystem are exotic species especially threatening to? A. Deserts B. Marine ecosystems C. Islands D. Tropical forests 23. Each neurone contains _______________ A. soma, dendrites and axon B. sensory, association and motor C. cerebrum, cerebellum and hypothalamus D. afferent, efferent and mixed 24. One of these statements is not true about Berry and Drupe. A. They both have thin epicarp B. They both have fleshy succulent mesocarp C. Their endocarp is edible D. They both have seed 25. Antibiotic discovery was done by the Scottish bacteriologist __________ A. Alexander Penicillius B. Alexander Fleming C. Alexandes Fleming D. AlexandesPenicillius 26. The type of cell division which forms the basis of Mendel's law of segregation is _______________ A. Mitosis B. Meiosis C. Somatic D. Synoptic 27. Archaebacteria is simply ____________________ A. A prokaryotes without cell wall B. An eukaryotes without cell wall C. A prokaryote without a peptidoglycan cell wall D. An eukaryotes without a peptidoglycan cell wall.

[Audio] 28. Leucosoleniabelongs to class _________________ A. Calcispongiae B. Hexactinellida C. Demospongiae D. Porifera 29. A pseudopodia that is threadlike, branched and interconnected is known as ___________________ A. Lobopodia B. Actinopodia C. Filopodia D. Reticulopodia 30. Photosynthetic microphylls are found in ________________ A. Division Psilophyta B. Division Lycophyta C. Division Sphenophyta D. Division Pterophyta 31. Polio myelitis is an infectious disease caused by ________________ A. virus B. protozoan C. bacterium D. fungus 32. Which of these is a trace element? A. Iron B. Copper C. Calcium D. Sulphur 33. Which of these diseases cannot be prevented by immunization? A. Polio myelitis B. Tuberculosis C. Cholera D. Onchocerciasis 34. Hydra removes undigested food by _________________ A. passing it through the anus B. passing it through the mouth C. means of contractile vacuole D. digesting it through the body surface 35. Which of the following is INCORRECT? The prothallus of a fern _______.

[Audio] A. is a flattened heart shaped structure. B. is green because its cells contain chloroplast. C. is the dominant plant. D. bears the sexual organs. 36. The science of taxonomy has two branches namely _____________ and ________________ A. Biology naming and biochemistry B. Nomenclature and Classification C. Botany and systematic D. Microbiology and systematic 37. To complement biotic analysis in measuring environmental factors the following are studied Except A. Soil B. Water C. Topography D. Geography 38. The period between inoculation of bacteria in culture medium and the beginning of multiplication is known as ________________ A. log phase B. lag phase C. stationary phase D. decline phase 39. Small proteinaceous infectious particles that do not contain nucleic acid genome that codes for their progeny are _______________ A. bacteria B. viruses C. HIV D. prion 40. Example of all-purpose media used in cultivation of bacteria by a bacteriologist is ___________ A. selenitc A agar B. blood agar C. nutrient agar D. tryptone soy agar 41. Which of the following is not a characteristic feature of the phylum Cnidaria? A. Polymorphism B. Cephalisation C. Body of two-germ layers D. Nematocysts.

[Audio] 42. Which of the following groups of plants are not considered as lower plants? A. Pteridophytes B. Bryophytes C. Cryptogams D. Spermatophytes 43. Non-living bodies in the cell includes one of these, _____________ A. Starch grains B. Chloroplast C. Ribosomes D. Cell wall 44. Alternation of generation in plants involves which of the following? A. Processes in two sexual pathways B. Processes in one single sexual pathway C. Spores dispersal alone D. Processes in homogamy alone 45. Which of these is not a form of respiration in Amphibians? A. Cuteneous B. Tubular C. Pulmunary D. Buccal-Pharyngeal 46. The factor that least affects food shortage in the sub-saharan Africa is _____________ A. flooding B. pests C. mixed cropping D. drought 47. Which one of the following factors may not directly affect population density of organisms? A. Edaphic B. Nutritional C. Mortality D. Emmigration 48. One of the major causes of laboratory acquired infection is inhalation of _________ A. air B. water C. particles D. infectious aerosol.

[Audio] 49. The major cell of the specific immune system are _______________ A. bone marrow cells B. erythrocytes C. lymphocytes D. monocytes 50. The normal microbacter of the stomach include all of the following except: A. Streptococcus B. Staphylococcus C. Lactobacillus D. Diphtheriods.

[Audio] BIOLOGY ESSAY QUESTIONS ESSAY QUESTIONS: Answer FOUR Questions in all; One from each Course TIME: 2HRS 1. (a). State 6 differences between sexual and asexual reproduction 6 marks (b). Write short notes on any 2 of the following: i. Haplontic life cycle ii. Diplontic life cycle iii. Haplodiplontic life cycle 4 marks BIO 001: GEN BIOLOGY 2. (a). Define the following terms i. Genotype ii. Phenotype iii. Hybrid iv. Dominant character. 4 marks (b). State clearly Mendel's first and second laws of inheritance 2 marks (c). If a pure breeding brown coloured rat BB is crossed with a pure breeding White rat bb, using diagrams only, show the genotype of the offspring up to the second filial generation. 4 marks BIO 001: GEN BIOLOGY 3. Describe the formation of two molecules of pyruvate during respiration 10 marks BIO 003: MICRO BIOLOGY 4. (a). Define the following terms i. Aseptic Technique ii. Antigens iii. Antibodies iv. Immunity 4 marks (b). List 6 rules that must be observed for any aseptic technique 6 marks BIO 003: MICRO BIOLOGY 5. (a). How does water in the soil enter the root hair of a plant? 6marks ( b) Name the tissue that conducts water from the root to the stem and leaves in a flowering Plant? 4marks BIO 002: BASIC BOTANY.

[Audio] 6. (a). State five functions of testosterone 5 marks (b). With aid of diagram only, describe mature spermatozoon 5 marks BIO 004: FUNDAMENTALS OF ZOOLOGY 7. (a). What is a tissue? 1 mark ( b). How are plant tissue formed 3 marks (c). Describe the structure and function of two vascular tissues 6 marks BIO 002: BASIC BOTANY 8. (a). List any 6 characteristics of the phylum mullusca 6 marks (b).Give 4 economic importance of the sub- class pulmonata 4 marks BIO 004: FUNDAMENTALS OF ZOOLOGY.