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Form 3 Biology Paper 1 End of Term 2 Examination 2022
Class: Form 3
Subject: Biology
Level: High School
Exam Category: Form 3 End Term 2 Exams
Document Type: Pdf
Views: 388
Downloads: 10
Exam Summary
NAME___________________________________________ ADM_______________ CLASS_______
BIOLOGY FORM TREE PAPER 1 (THEORY)
TIME: 2 HOURS
INSTRUCTIONS TO CANDIDATES
• Write your name class and admission number in the spaces provided above
• Answer all the questions in the spaces provided.
• All working must be clearly shown where necessary.
1. State the functions of each of the following cell organelles. (2mks)
(i) Golgi bodies ………………………………………………………………………………………………. ……………………………………………………………………………………………….
ii) Smooth Endoplasmic reticulum ………………………………………………………………………………………………. ……………………………………………………………………………………………….
2. Relate the structure of guard cell to its functions. (2mks) ……………………………………………………………………………………………….………………………………………………………………………………………………………………. ……………………………………………………………………………………………….………
3. In an experiment to calculate respiratory Quotient, a rabbit was observed to have taken 80cm3 of oxygen and produced 79.9cm3 of carbon (IV) oxide in five minutes. Identify the type of food consumed. Show your working) (2mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
4. (a) Define the homeostasis (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(b) Explain the changes that takes place in blood vessels for the skin to regulate heat loss. (2mks) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
5. (a) Define the term Osmosis. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(b) Outline two roles of active transport in Living organisms. (2mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
6. Name the tissue/cell in plants responsible for
(a) Transport of water and mineral salts . (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(b) Transport of carbohydrates. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(c) opening and closing of stomata (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
7. (a) what is cell division (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(b) Name two types of cell division (2mks) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
8. A study was done to estimate the population of fish in a pond. 396 fishes were caught, marked and released. After 24 Hours, 200 fishes were caught out of which 100 had been marked.
(a) Name the most appropriate instrument that was used to catch the fish. (1mk) ……………………………………………………………………………………………….………
(b) Calculate the total population of fish in the aquarium. (2mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
9. State two ways in which floating leaves of aquatic plants are adapted to gaseous exchange. (2mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
10. State the functions of each of the following parts of the skin. (3mks)
(a) cornified layer ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(b) Blood vessels ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(c) Sebaceous gland ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
11. State two functions of bile juice in the digestion of food. (2mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
12. How does substrate concentration affect the rate of enzyme action. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
13. (a) Name the surface for gaseous exchange in insects. (1mk) ……………………………………………………………………………………………….………
(b) How is surface named in (a) above suited for it’s functions. (2mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….………
14. Give the economic importance of the following plant excretory products.
(i) Tannins (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(ii) Colchicine (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
15. (a) Define the term Biology (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(b) What is the meaning of BIO and LOGOS (2mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
16. Name three substances in a balanced diet that does not require digestion (3mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
17. (a) (i) Name the membrane that encloses the Heart. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(ii) State the functions of the structure named in (a) (i) above. (1mk)
(b) Give a reason why blood does not clot in blood vessels. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(c) Name a defect of the circulatory system. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
18. Explain the difference between (4mks)
i) Plasma and Serum …………………………………………………………………………………………………………………………………………………………………………………………………………….
ii) Arteriosclerosis and varicose vein ………………………………………………………………………………………………………………………………………………………………………………………………………………………
19. What are the end products of respiration in animals when there is insufficient oxygen supply. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
20. State three importance of reproduction (3mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….………
21. The following diagram shows the female parts of a flower
(a) What will the parts marked X and Y develop into after fertilization. (2mks) X ……………………………………………………………………………………………. Y …………………………………………………………………………………………….
(b) Name the part labeled “W” (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
22. Name the causative agents of the following human diseases
(a) Amoebic dysentry (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(b) Cholera (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
23. Name four digestive enzymes in a three months old baby (4mks)
24. State two adaptations of the herbivorous molar tooth to its functions. (2mks) ……………………………………………………………………………………………….………
……………………………………………………………………………………………………….
25. Explain the role played by each of the following bacteria to the Nitrogen cycle.
(a) Nitrosomonas. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(b) Rhizobium (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(c) Pseudomonas denitrificans. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
26. (a) What do you understand by the term immunity (1mk) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(b) State 2 types of immunity (2mks) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
27. The diagram below shows a plant.
(a) Name the part labeled B. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(b) State the function of the part labeled “A”. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
(c) Name the division to which the plant belongs. (1mk) ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
28. State the roles played by the following in homeostasis (2mks)
(a) Glucagon ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. (b) Anti – diuretic hormone ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
29. Name the first three stages of mitosis (3mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
30. State two adaptations of gill filaments for gaseous exchange. (2mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ……………………………………………………………………………………………………….
31. Give reasons why muscle cells, sperm cells and kidney cells have large numbers of mitochondria. (2mks) ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….……… ………………………………………………………………………………………………………. ……………………………………………………………………………………………….………
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