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KCSE Biology Paper 1 – Kabarak High School Mock 2015



KCSE Biology Paper 1 – Kabarak High School Mock 2015

Mock 2015 – Kabarak High School

Biology Paper 1

Answer all the questions in the spaces provided.
1.

In what two ways does excretion differ between plants and animals?

 2 marks





2.

(a) Give two contributions made by Carolus Linneus to classification (2marks)

(b) Classify Human being based on the Order and Family it belongs to? (2marks)

i) Order

ii) Family





 4 marks

3.

(a)State two functions of the plasma membrane? (2marks)

(b) Give the synthesis role of smooth endoplasmic reticulum. (1mark)

 3 marks

4.

(a) Distinguish between Plasmolysis and turgidity (2marks)

(b) Explain how the following factors affect active transport (4marks)

i) Oxygen concentration

ii) Metabolic poisons

 6 marks

6.

(a) What is anaphylaxis (1mark)

(b) State the difference between active artificial acquired and active natural acquired immunity. (2marks)

 3 marks

7.

State how the following structural features affect transpiration (3marks)

a) Leaf fall

b) Sunken stomata

c) Thin cuticle

 3 marks

8.

The diagram below represents a specialized plant structure

Biology Paper 1 Question Paper - Mock 2015 - Kabarak High School

(a) Name the cells labelled A and B (2marks)

A ………………………

B………………………

(b) Describe the mechanism of closing of aperture C (4marks)

 6 marks

9.

Name the causative agent of whooping cough (1mark)

 1 marks

10.

State the economic importance of the following excretory products in plants (2marks)

a) Nicotine

b) Quinine

 2 marks

11.

Give three distinguishing features of class Aves (3marks)

 3 marks

12.

State two differences in the roots of Monocotyledonae and Dicotyledonae?

Biology Paper 1 Question Paper - Mock 2015 - Kabarak High School

 2 marks

14.

(a) Give the importance of nitrogen cycle. (1mark)

(b)What are the roles of the following organisms in an ecosystem? (2 marks)

1)Decomposers

2)Detrivores

 3 marks

15.

Define the term:

1) Greenhouse effect (1mark)

2) Global warming (1mark)

 2 marks

16.

(a)What is organic evolution? ( 1mark)

(b)Briefly explain how the peppered moth (Bistonbetularia) shows natural selection (3marks)

c) Distinguish between convergent and divergent evolution (2 marks)

 6 marks

17.

Study the diagram and answer the questions that follow

Biology Paper 1 Question Paper - Mock 2015 - Kabarak High School

(a) In which set-up did the lime water become turbid? ( 1 mark)

(b) Explain your answer in (a) above ( 2 marks)

 3 marks

19.

What are the roles of each of the following on transmission of impulses:( 2 marks)

i) Nodes of Ranvier

ii) Myelin Sheath

 2 marks

20.

(a) Give three effects of over secretion of adrenaline?

 3 marks

21.

(a) Define non disjunction? (1 mark)

(b) Name two genetic disorders of the blood. (2marks)

 3 marks

22.

How are female parts of wind pollinated flowers adapted to perform their function?

 2 marks

23.

State how herbaceous plants obtain their support

 3 marks

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