Kairi High School

KAIRI HIGH SCHOOL

FORM 2 BIOLOGY

2ND TERM 2017 EXAM

Name: ______Adm. No. _____ Class: _____

1. Name the major branches of biology. 2mks

i)

ii)

2. The scientific name of wolf is Canis lupus. To what taxonomic group does the name belong? 1mk

a) Canis - b) Lupus –

3. Name the instruments used in the laboratory for magnification. 1mk

4. Define the following terms; 2mks

a) species –

b) binomial nomenclature –

5. In which taxonomic group are there members with? 1mk

a) highest number of common characteristics -

b) lowest number of common characteristics –

6. State two reasons why classification is important. 2mks

i)

ii)

7. Why is respiration essential in living organisms? 1mk

8. State reasons why it is important to carry out the following processes

during preparation of temporary slides. 4mks

i) cutting into slices –

ii) adding drops of water –

iii) lowering the section slowly on the slide –

iv) adding iodine –

9. State the functions of the following parts found in a light microscope. 2mks

a) condenser –

b) diaphragm –

10. Draw and label the structure of an animal cell as seen under a light microscope. 3mks

11. State the functions of the following cell organisms. 3mks

a) Mitochodrion –

b) Nucleus –

c) Cell wall –

12. State how the following cells are specialized to perform their function. 2mks

a) Red blood cells –

b) Sperm cells –

13. Name two differences between a light and an electron microscope. 2mks

Light microscope / Electron microscope
i)
ii)

14. Name the part of cell that is useful in maintaining support in herbaceous plants. ______1mk

15. Albumin (a protein), starch and amylase were placed in a visking tubing. The tubing was placed in a beaker of distilled water as shown.

thread

distilled water

visking tubing

a) After 3 hours, the visking tubing head become turgid.

Explain the observation. 2mks

b) When the liquid in the beaker was boiled with benedict’s solution after 3 hours, a yellow precipitate was formed. Explain the observation. 2mks

c) Name the substances that would be present in the visking tubing only 3 hours after the start of the experiment. Explain. 2mks

14. Give two major differences between 0smosis and diffusion. 2mks

i)

ii)

15. State two roles of diffusion in plants. 2mks

i)

ii)

16. In relation to animal cell differentiate between haemolytics and

cremation. 2mks

17. The equation below represents a process that takes place in plants.

6 C02(g) + 6 H20 ______C6H1206 + 6 02

a) Name the process - 1mk

b) Name the stages of the process stating how which occurs. 1mk

c) State two factors not shown in the equation necessary for the process

to take place. 2mks

i)

ii)

d) State what happens to the end products of the process. 2mks

18. Explain how the following factors affect the rate of photosynthesis. 2mks

a) Temperature -

b) Concentration of Carbon (IV) oxide -

19. State 3 factors that affect enzymatic activities. 3mks

i)

ii)

ii)

20) The graph below shows effect of substrate concentration on the rate of an enzyme catalyzed reaction.

Rate of

reaction

______

substrate concentration

a) Account for the shape of the graph between;

A and B – 2mks

B and C – 2mks

21. The diagram below represents the lower jaw of a mammal.

a) Name the mode of nutrition of the mammal whose jaw is shown. 1mk

b) State one structural and one functional difference between the teeth

labeled R and T. 2mks

c-i) Name the tooth labeled S - 1mk

ii) State how the tooth named in (c-i) above is adapted to its function. 2mks

22. A person with blood group 0 requires a transfusion. Name the blood group(s) of the possible donors. 1mk

b) State the blood groups of people who can receive blood from people of all other blood groups and give the name given to such people; 2mks

23. What is immunity? 1mk

b) Distinguish between active and passive natural acquired immunity. 2mks

24. State two structural adaptations of veins. 2mks

i)

ii)

b) State three adaptations of red blood cells to their functions. 3mks

i)

ii)

iii)

25. Match the following conditions to the symptoms. 4mks

Arteriosclerosis / Heart is over worked and a person is prone to heart failure
Varicose veins / There is a clot in the blood
Thrombosis / Blood cancer
Hypertension / Decrease in amount of red blood cells
Leukemia / Blood vessels become dilated and lowering blood pressure to extent of death
Anaphylaxis / Red blood cells are deformed. They become long, thin and crescent like in shape
Sickle cell anemia / Superficial veins become swollen at base of the legs
Anemia / Hardening of walls of the artery

26. Name the blood vessels responsible for; 2mks

a) carrying deoxygenated blood to the heart –

b) carrying oxygenated blood from the heart –

c) carrying deoxygenated blood to the lungs from the heart –

d) carrying oxygenated blood from the lungs to the heart –

27. State three characteristics of a respiratory surface. 3mks

.

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