GET THE ANSWERS HERE
BIOLOGY FORM II EXAM
END OF TERM 2- 2021
TIME: 2 HRS
NAME……………………………………………………CLASS. ……………………………………
ADM. NO. ………………………………………………DATE………………………………………
QUESTIONS
- The diagram below represents a transverse.
Section of a young stem.
- Name the parts labeled A and B (2mks)
- State functions of the part labeled C, D, E. (3mks)
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- a) Why are people with blood group O universal donors. (2mks)
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b) A person with blood group AB requires blood transfusion. Name blood groups of
the donor. (2mks)
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- a) Name the type of circulatory system found in insects (1mk)
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b) Name the blood vessel that transports blood from
- Small intestine to the liver. (1mk)
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- Lungs to the heart. (1mk)
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c) In what form is oxygen transported from the lungs to the body tissues? (1mk)
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- Distinguish between natural and acquired immunity. (2mks)
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- State four functions of blood other than transport. (4mk)
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- Name the antigens that determine human blood groups. (2mks)
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- State structural differences between arteries and veins. (6mks)
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- Give reasons for carrying out the following procedure when making temporary slides.
- Making thin sections. (1mk)
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- Adding water to the sections. (1mk)
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- Placing coverslip over the plant section. (1mk)
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- a) Distinguish between diffusion and osmosis. (2mks)
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b) The diagram below show a red blood cell that was subjected to certain treatment.
At start At end
Account for the shape of the cell. (2mks)
- a) Name the material that strengthens xylem vessels. (1mk)
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b) Name the tissue that is removed when the bark of the dicotyledonous stem is ringed(1mk)
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11. a) State what happens during light stage of photosynthesis. (4mks)
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b). What are the end products light stage. (2mks
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12. State 2 factors affecting enzymatic activities. (4mks
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13. How does the following affect the rate of diffusion:
- Diffusion gradient. (2 mk)
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- Size of the molecules (2 mk)
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- Thickness of the membrane. (2 mk)
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- Temperature (2mks)
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- Surface area to volume ration. (2mks)
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14. Explain how the following factors determine the daily energy requirements
- Age (2mks)
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- Occupation (2mks)
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- Sex (2mks)
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15. Name the appropriate food substances for each of the following enzymes.
- Ptyalin. (2mks)
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- Pepsin. (2mks)
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b). State the two roles of mucus in the stomach. (2mks)
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16. a) State 3 adaption of xylem to its function. (3mks)
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b) Describe how 4 environment factors affect the rate of transportation. (8mks)
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17.a) State the difference between closed and open circulatory system. (2mk)
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b).State two ways in which the heart muscles are adapted to their functions. (2mks)
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18. State the role of the following organelles. (6mks)
- Golgi apparatus
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- Ribosomes
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a. Golgi apparatus
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- Lysosomes
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- Mitochondrion
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- Chloroplasts
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- Centrioles
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