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Biology Form 1 Question Paper

Biology Form 1

Course:Secondary Level

Exam Year:2006

IGUNGA GIRLS HIGH SCHOOL

BIOLOGY FORM 1 END YEAR EXAM

INSTRUCTIONS
Attempt ALL questions
Give clear and logical answers
Wrong spelling will be penalised

1.
a. What is a species? (2mks)

b. Explain why a lion and a cat cannot interbreed (2mks)

2. One of the characteristics of living things is that they locomote (movement), show three ways in which plants compensate for lack of locomotion (3mks)

b. Name any three cell functions (3mks)

3. Students of Bao Secondary school observed two given cells, immersed in dilute sugar solution. At the end of the experiment;
In cell A, only water molecules entered, while in cell B both water and sugar molecules entered.

A. Describe the property of cell;

A.

B. (2mks)

ii. Give the importance of the above property (2mks)

4. Define diffusion (2mks)

b. How is the rate of diffusion affected by

i. Size of molecules

ii. Temperature

iii. Thickness of membranes (3mks)

5. Explain the role played by;

i. The palisade layer in a leaf (1mk)

ii. Leaf veins (2mks)

6. State four conditions necessary for photosynthesis (4mks)

7. Name any two organic compounds (2mks)

b. State the processes

i. Where molecules of monosaccharides join together to form complex carbohydrate molecules (1 1/2 mks)

ii. Where disaccharides are readily broken down into their constituent monosaccharides (1 1/2mks)

8. Distinguish between intracellular and extracellullar enzymes (3mks)

9. Name the enzymes that catalyse the following reactions (3mks)

i. Hydrolysis
ii. Oxidation
iii. Reduction

10. What are co-factors? Name any two (2mks)

11. Define balanced diet (2mks)

b. Why should roughage be included in any diet? (3mks)

c. Explain five factors determining energy requirements in a human being (5mks)

12.
a. Distinguish between osmosis and active transport (2mks)

b. Give two functions that require active transport in living organisms (2mks)

13. Draw a well labelled diagram of a molar tooth (6mks)

14. Name any two dental diseases (2mks)

15. Define the following terms;
a. Assimilation (2mks)

b. Digestion (2mks)

16. Explain how carnivores are adapted to their feeding (5mks)

Biology Form 1 Question Paper

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