SENIOR two Biology Exam 14

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1 Our country, our future NAME:. STREAM SENIOR two Biology Exam 14 TIME: 1.30 HOURS - Attempt all questions - Circle the correct alternative SECTION A: 1. A mother fed her young child for 3 years on meat, maize, butter, and milk. From which one of the following deficiency diseases is the child likely to suffer? A: kwashiokor B: marasmus C: Rickets D: scurvy 2. hich one of the following is an adaptation of reptiles for terrestrial environment? A: lungs B: scales C: Elongated body D: limbs 3. Guard cells differ from normal epidermal cells in that: A: their surfaces are not covered by cuticle B: they contain chloroplasts C: they have no nuclei D: they do not carry out photosynthesis. 4. hich of the following is a class? A: myriapoda B: platyhelminthes C: Annelida D: mollusca 5. hich of the following suits the hydra? A: chordata B: Nematoda C: Annelida D: Coelenterata

2 2 6. hich of the following contains an enzyme that digests cellulose.? A: gastric juice B: succus entericus C: pancreatic juice D: Saliva 7. A blood cell placed in distilled water A: shrivels due to water loss B: does not change C: will swell and burst due to water gain D: actively transport water into itself 8. Parthenocarpy is A: fruit formation after cross pollination B: fruit formation after self fertilisation C: failure of a fruit to form after fertilisation D: fruit formation without fertilisation 9. The type of soil where water percolation is easiest is the: A: loam B: silt C: clay D: sand 10. The dry dehiscent fruit with two sutures is: A: legume B: an achene C: a follicle D: a capsule 11. An example of parasitism is shown by A: algae and lichens B: tick and a cow C: dog and man D: bacteria and leguminous plants 12. hich of the following is the only correct statement about pollen in a flowering plant? A: an attractive colour to the flower B: contain male reproductive cells of a flower C: contain the female reproductive cells of a flower D: a sweet smell to the flower 13. Fibrous roots which develop from nodes of stems such as sugarcane are examples of A: secondary roots B: primary roots C: tertiary roots D: Adventitious roots 14. hich of the following do belong to class insecta? A: termites and houseflies B: tsetse flies and centipedes C: mites and houseflies D: termites and mites 15. hich of the following sequences is correct? A: digestion ingestion assimilation absorption B: ingestion digestion absorprtion assimilation C: ingestion digestion assimilation absorption D: assimilation ingestion digestion absorption 16. hich of the following vessels would have the highest concentration of sugars? A: Xylem and hepatic vein B: xylem and hepatic portal vein

3 3 C: phloem and hepatic vein D: phloem and hepatic portal vein 17. A green plant needs to take in Nitrogen from the soil in the form of nitrates in order to: A: make chlorophyll so that it can photosynthesize food B: complete the formation of carbohydrates after photosynthesis C: produce proteins from the mineral produced by photosynthesis D: maintain an osmotic pressure in the roots so that they can take in water from soil 18. The young stage of a grasshopper is called a A: larva B: maggot C: Pupa D: Nymph 19. hich of the following undergoes continous growth? A: grasshopper B: bat C: spider D: Millipede 20. hich one of the following monosaccharides is a common component of starch, glycogen and sucrose? A: Fructose B: Galactose C: Glucose D: Maltose 21. Bacteria which stick together to form a chain are the A: Diplococci B: streptococci C: spirilla D: spirochaetes 22. hich of the following is not a larval stage? A: Grub B: maggot C: caterpillar D: chrysalis 23. A microscope has a magnification of X 100. The power of its eyepiece is 5. hat is the power of the objective lens? A: 500 B: 20 C: 100 D: 50 SECTION B: 24. The figure below illustrates an experiment to investigate the conditions for photosynthesis. The plant is in light but had previously been kept in darkness. Flask Leaf Stem of a plant Cork Sodium hydroxide solution

4 4 (a) hat condition was being investigated? (b) hy was it necessary to keep the plant in darkness? (c) hat was the purpose of sodium hydroxide in the flask? 25. X V

5 5 The figure above is a diagram of a body part of a biological organism. (a) Name the parts labelled V X (b) hat are the functions of the parts labelled (c) Suggest the identity of the organism represented above. Give a reason for your answer Identity Reason (d) Classify the above organism you have identified Kingdom Phylum Class. Choose one question SECTION C: 1. Describe an experiment you would carry out to test for non-reducing sugars in a solution of a food sample. 2. Briefly describe the digestion of proteins in man 3. Explain how the ileum is suited for its functions.

Our country, our future 2 HOURS

Our country, our future 2 HOURS Our country, our future NAME:. STREAM SENIOR two Biology Exam 2 2 HOURS INSTRUCTION TO CANDIDATES This paper s consists of three sections; A, B and C. Attempt all questions in both sections A and B, and