NAME:…………………………………………….. ADM. NO..…..………..
CLASS:…………………
BIOLOGY
(Theory)
TIME: 2HOURS
FORM 2
INSTRUCTIONS TO CANDIDATES
Write your name and Adm. number in the spaces
provided.
Answer ALL the questions in the spaces provided,
FOR EXAMINERS USE ONLY
Question Maximum score Candidates score
1-20 70
This paper consists of 8 printed pages. Candidates should check the
question paper to ensure that all the pages are printed as indicated and no
questions are missing.
SECTION A
1. Name three factors that would slow down enzyme activity. (3 marks)
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2. State three adaptations of gills to their function. (3 marks)
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3. Distinguish between haemolysis and plasmolysis. (2 marks)
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4. The diagram below shows part of alimentary canal of a mammal.
i) Name the parts labeled.
A……………………………………………. (1 mark)
C……………………………………………. (1 mark)
ii) State the functions of the part labeled B. (2 marks)
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5. State three properties of a cell membrane. (3 marks)
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6. a) Differentiate between essential and non- essential amino acids. (2 marks)
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b) Name two constituents of food that are absorbed without digestion. (2 marks)
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7. Name support tissues in plants characterized by the following (3 marks)
i) Cells being turgid
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ii) Cells being thickened by cellulose
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iii) Cells being thickened by lignin
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8. Name the type of circulatory system found in the phylum Arthropoda. (1 mark)
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9. State the areas of the plant where translocated materials are taken. (2 marks)
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10. Name the component of a person’s diet that is essential for peristalsis. (1 mark)
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11. The reaction represented by the equation below occurs in the body.
Hydrogen peroxide Oxygen + Water
Enzyme Y
i) Name enzyme Y. (1 mark)
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ii) Name an organ in the body where the reaction occurs. (1 mark)
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iii) State the importance of the reaction to the body (1 mark)
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12. What do you understand by the following terms
i) Anatomy (1 mark)
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ii) Biochemistry (1 mark)
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13. State the functions of the following parts of a cell
i) Ribosome (1 mark)
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ii) Chloroplasts (1 mark)
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14. i) what is the name of the digestive juice secreted in the mouth (1 mark)
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ii) name two glands that secrete the juice named in (i) above (2 marks)
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15. State the role played by the following substance in digestion. (2 marks)
i) Hydrochloric acid
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ii) Bile salts
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16. Name the branch of biology that deals with the study of zooplanktons. (1 mark)
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Section B
17. The diagram below shows cells in plants:-
i) Identify the cells shown above (1 mark)
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ii) Explain how the cells are adapted to their function (2 marks)
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iii) Explain how accumulation of carbon (IV) Oxide in the cells above would lead to the closure of structure
A (4 marks)
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18. (a) State the role of the following parts of a light microscope. (2 marks)
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i) Diaphragm
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ii) Revolving nosepiece
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(b) During preparation of temporary slides, the following procedures are carried out, state the importance
of each. (2 marks)
i) Staining
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ii) Cutting very thin sections
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(c) Name the cell organelle that: (2 marks)
i) Forms secretory vesicles
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ii) Transports lipids
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(d) Name the tissue that carry out the following functions in plants: (2 marks)
i) Filling the spaces between other tissues.
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ii) Manufacture of food substances.
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19. The diagram below represents part of a geasous system in a grasshopper.
P Q
a) Name the structures labeled P and Q
P……………………………………………………… (1 mark)
Q ……………………………………………………… (1 mark)
b) State the function of the structure labeled P (1 mark)
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c) Describe the path taken by carbon (IV) oxide from the tissues of the insect the atmosphere (3 marks)
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d) How is the structure labeled Q adapted to its functions (2 marks)
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20. The figure below shows a section through a leaf. A leaf is designed for photosynthesis and this process
provides a supply of simple sugars for a plant.
a) i) State the adaption of the chloroplasts to photosynthesis. (2 marks)
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ii) Explain the advantage of the distribution of the chloroplasts as shown figure above. (2 marks)
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iii) Suggest the function of the stomata and the spaces between the spongy mesophyll cell in the process
of photosynthesis. (2 marks)
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b) i) Name the tissue that translocate sugars from the leaves to others parts of the plant. (1 mark)
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ii) Name the mineral ion that is used to form proteins. (1 mark)
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