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Biology Paper 1- Question Paper
Biology Paper 1-
Course:Secondary Level
Institution: Mock question papers
Exam Year:2010
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Name………………………………………………………. Index No……………………………
School……………………………………………………… Signature……………………………
Date…………………………………
231/1
BIOLOGY
PAPER 1
July/August 2010
2 hrs
MANGA DISTRICT JOINT EVALUATION TEST – 2010
Kenya Certificate of Secondary Education (K.C.S.E)
231/1
BIOLOGY
PAPER 1
July/August 2010
2 hrs
INSTRUCTIONS
Answer ALL the Questions in this paper in the spaces provided.
FOR EXAMINER’S USE ONLY
QUESTIONS
MAXIMUM SCORE CANDIDIATES SCORE
1 -33
80
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This paper consists of 8 printed pages. Candidates should check carefully
to ascertain that all the pages are printed as indicated and no questions are missing.
1. Name the type of skeleton in:
i) Grasshopper (1mk)
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ii) Sheep (1mk)
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2. Explain why herbaceous plants droop in hot dry weather while woody plants remain erect in
similar (2mks)
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3. Below is a diagram of the structure of a neurone.
a) With a reason identify the type of neurone. (2mks)
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b) What is the role of the neuron named above. (1mk)
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4. State three functions of auxins in the growth of plants. (3mks)
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5. Name the two main types of mutations. (2mks)
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6. Why is Larmack’s theory on the mechanism of evolution scientifically unacceptable? (2mks)
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7. Explain the characteristics of a cell at anaphase of mitosis. (3mks)
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8. Name a method that could be used to estimate the population of:
i) Black jack in a garden (1mk)
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ii) Fish in a pond (1mk)
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9. State three characteristics of the environment in which plants called mesophytes grow (3mks)
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10. Name two common liver diseases. (2mks)
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11. It. State a role of each of the following parts of the skin.
i) Sebaceous glands (1mk)
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ii) Erector pili muscles (1mk)
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iii) Subcutaneous fat layer. (1mk)
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12. State three adaptations of phloem to its function. (3mks)
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13. Explain why enzyme pepsin is secreted as pepsinogen in the stomach. (2rnks)
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14. An animal has no incisors, no canines, 6 premolars and 6 molars in its upper jaw, in the lower
jaw there are 6 incisors, 2 canines, 6 premolars and 6 molars.
i) Write the dental formula of the animal. (1mk)
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ii) Calculate the total number of teeth for the animal. (1mk)
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iii) What is the likely food of the animal. (1mk)
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15. Below is the structure of an oganel1e found in a plant (1rnk)
i) Name the organelle. (1mk)
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ii) State the functions of the organelle named above. (1mk)
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iii) Name the part labeled X. (1mk)
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16. Name two mineral elements required in the synthesis of chlorophyll. (2mks)
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17. State three reasons why you would prefer the use of an electron Microscope rather than the light
microscope. (3mks)
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18. The scientific name of the domestic cat is Pelis catus. Classify the cat into:
i) Kingdom (1mk)
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ii) Genus (1mk)
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iii) Species (1mk)
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19. State three secondary sexual characteristics brought about by hormone testosterone. (3mks)
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20. State two characteristics in flowers that may hinder self - pollination in plants. (2mks)
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21. Name a sex-linked trait in man associated with:
i) Y – chromosome (2mks)
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ii) X – chromosome (1mks)
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22. State three applications of Genetics. (3mks)
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23. State three reasons why biomass decreases as you. move from a lower to a higher tropic level.
(3mks)
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24. Of what advantages is metamorphosis to the life of insects? (2mks)
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25. Below is a diagram of a plant response.
i) Name the plant response illustrated above. (1mk)
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ii) State the importance of the named above response to the plant. (1mk)
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26. State two functions of the cerebrum of the brain, (2mks)
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27. What do you understand by the following parts of the eye:
i) Yellow spot. (1mk)
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ii) Blind spot (1mk)
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28. State three effects of releasing untreated sewage into a river. (3mks)
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29. State three advantages of breathing through the nose than through the mouth. (3mks)
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30. Define wilting and explain its importance to the plant. (3mks).
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31. State three industrial applications of anaerobic respiration. (3mks)
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32. State three methods of excretion in plants. (3mks)
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