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Biology Paper 1 Form 2 Question Paper

Biology Paper 1 Form 2

Course:Biology

Exam Year:2008

Biology Paper 1

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Answer all questions

1. State the functions of the following organelles:

i. Nucleolus (1mk)

ii. Golgi bodies (1mk)

2. State the differences between:

i. Osmotic potential and wall pressure (2mks)

3. What is the role of light during the process of photosynthesis (2mks)

4. Identify the distinguishing characteristics of the division pteridophyta (3mks)

5. State the functions of the following tissues of a vascular bundle:

i. Phloem (1mk)

ii. Xylem (2mks)

6. What causes the accumulation of lactic acid in the body muscles during a strenuous exercise (2mks)

b. Explain how oxygen debt is overcame (3mks)

7. State the role of the following in food digestion in man:

i. Liver (1mk)

ii. Salivary glands (2mks)

8. Distinguish between acquired and natural immunity (2mks)

9. Name three sites where gaseous exchange takes place in aquatic plants (3mks)

10. State the functions of red blood cells in mammalian body (2mks)

11. What is the difference between osmoregulation and homeostasis (2mks)

12. What is the causative agent for the following diseases:

a. Typhoid (1mk)

b. Amoebic dysentry (1mk)

13. Explain how the following help plants to minimize water loss:

i. Shedding of leaves (1mk)

ii. Reduction of leaf size (1mk)

14. a. Name the bacteria found in the root nodules of leguminous plants (1mk)

b. What name is given to the association above (1mk)

c. How does the organisms gain from the association above (1mk)

15. Name two functions of the kidney (2mks)

16. Name the factors that affect enzyme controlled reactions (4mks)

17. Name two suitable methods that can be used to estimate the population of grasshoppers (2mks)

18. State the changes that take place in the chest cavity during exhalation (3mks)

19. To estimate the population of mosquitoes in Gikomba market according to Kenya Medical Research Institute, 400 mosquitoes were caught, marked and released. After 24 hrs, 200 mosquitoes were caught and of which 80 had marks.

Estimate the population size of the mosquitoes in the village (4mks)

20. What are the differences between mitosis and meiosis (4mks)

21. What are the advantages of asexual reproduction (2mks)

22. Name the kingdom to which the following belong

i. Amoeba (1mk)

ii. Give reasons for you answers (2mks)

23. Complete the information below (6mks)

i. Insecta:

- Body division________

- Number of limbs________

ii. Diplopoda:

- Body division________

- Number of limbs________

iii. Arachnida:

- Body division________

- Number of limbs________

24. Name two organisms which form the biological environment of the following

i. Roundworm (2mks)

ii. Mosquito (2mks)

25. In a human being's urine, some sugar was detected in a sample during laboratory test.

a. Name the hormone that was deficient in the person (1mk)

b. Name the gland that produces this hormone (1mk)

c. Name the disease the person is likely to be suffering from (1mk)

Biology Paper 1 Form 2 Question Paper

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