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Biology Question Paper

Biology

Course:Secondary Level

Exam Year:2011

1a. What are chromosomes? Where are they found in the cell? 5mks
b. What scientific name is given to
i. A cell that has half the full number of chromosome in an organism 1mk
ii. A cell with the full number of chromosomes in an organism 2mks
2. Name three sampling methods commonly used in ecological 3mks
3. Define the following terms
i. Biosphere
ii. Habitat
iii. Population
4. Name any four abiotic factors that are likely to influence the plant and animal life 2mks.
5. Name three types of carpels 3mks
6. Name two cell organelles present in plant cell only 2mks
7. Give the reasons why the following precautions are necessary when making microscopic sections for viewing 3mks
a. Staining
b. Cutting thin sections
c. Keeping the section wet.
8. State two functions of cuticle in plant leaves 3mks
9. Give three functions of blood. 3mks
10. Distinguish between sexual and sexual reproduction 2mks
b. State two importance of the following living things 4mks
i. Locomotion
ii. Gaseous exchange
11. State two functions of the cell membrane 2mks
12. Explain the following terms used in chemicals of life
i. Condensation 2mks
ii. Hydrolysis
13. What are enzymes 1mk
b. State their properties 2mks
14. Explain what would happen to the see blood cells if they were placed in a concentrated salt solution 2mks
15. Explain why left ventricle has thicken walls than the right 2mks
16. State how the fellowing structures in the skin regulate body temperature 4mks
i. Sweat glands
ii. Arterioles
17. Explai how sunken stomachs lower the rate of transpiration 2mks

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