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Biology Paper 231/1 K.C.Se 2006 Question Paper

Biology Paper 231/1 K.C.Se 2006

Course:Secondary Level

Exam Year:2006

BIOLOGY PAPER 231/1 K.C.SE 2006
QUESTIONS.
1. a) State the functions of cristae in mitochondria.
b) The diagram below represents a cell organelle.
(i) Name the part labeled Y. (1mk)
(ii) State the functions of the part labeled X. (1mk)
2. Name the part of the flower that develops into
a) Seed
b) Fruit ( 1mk)
3. a) Name two tissues in plants which are thickened with lignin. (2mks)
b) How is support attained herbaceous plants? (1mks)
4. a) Name the fluid that is produced by sebaceous glands. (1mk)
b) What is the role of sweat in human skin? (2mks)
5. State two ways in which floating leaves of aquatic plants are adapted
to gaseous exchange. (2mks)
6. a) State three characteristics of Monera that are not found in
other kingdoms. (3mks)
b) Name the class to which a termite belongs (1mk)
7. a) Name one defect of circulatory system in humans. (1mk)
b) state three functions of blood other than transport. (3mks)
8. State the role of vitamin C in humans. (2mks)
9. a) State two processes which occur during anaphase of mitosis. (2mks)
b) What is significance of meiosis? (2mks)
10. State the important of tactic response among some members
of kingdom protista. (1mks)
11. State the role of insulin in human body. (1mks)
12. An experiment was set up in the experiment as show below.
The set up was left for 30 minutes.
a) State the expected results. (1mk)
b) Explain your answer in (a) above (3mks)
.
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13. a) In what form is energy stored in muscles (1mk)
b) State the economic important of anaerobic respiration in plants.(2mks)
14. a) Distinguish between epigeal and hypogeal germination. (1,mk)
b) Why is oxygen necessary in the germination of seeds? (2mks)
15. Explain continental drift as an evidence of evolution. (3mks)
16. What is the importance of the following in an ecosystem? (2mks)
a) Decomposers
b) Predation
17. a) Distinguish between the terms homodont and heterodont. (1mk)
b) What is the function of carnassials teeth? (1mk)
c) A certain animal has no incisors, no canines, 6 premolars and 6
Molars in its upper jaw. In the lower jaw there are 6 incisors, 2 canines, 6
Premolars and six molars.
Write its dental formula.
18. a) State two functions of bile juice in the digestion of food. (2mks)
b) How does substrate concentration affect the rate of enzyme action?(1mk)
19 a) Explain how the following prevent self pollination. (1mk)
(i) Protoadry
(ii) Self – sterility.
b) Give three advantages of cross pollination. (3mks)
20 a) What name is given to response to contact with surface exhibited by tendrils
and climbing stems in plants?
b) State three biological importance of tropisms plants.
21. The diagram below represents a reflex are in human.
a) Name the parts labeled X and Y
b) Name the substance that is responsible for the transmission
of an impulse across the synapse. (1mks)
22. a) State the function of ciliary muscles in the human eye. (1mk)
b) State two functional differences between the rods and cones
.
90
in the human eye. (2mks)
23. State the function of each of the following parts of human ear. (4mks)
a) Ear ossicles
b) Cochlea
c) Semi circular canals
d) Eustachian tube.
24. State four ways in which respiratory surfaces are suited to their function.
(4mks)
25. a)A dog weighing 15.2kg requires 216kj while a mouse weighing
50g requires 2736kj per day. Explain. (2mks)
26. The chart below represents a simplified nitrogen cycle.
What is represented by X,Y, and Z?
27. Name the end products of the light stage in photosynthesis.

Biology Paper 231/1 K.C.Se 2006 Question Paper

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