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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.

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

 2 marks


(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


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

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

 3 marks


(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


(a) What is anaphylaxis (1mark)

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

 3 marks


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

a) Leaf fall

b) Sunken stomata

c) Thin cuticle

 3 marks


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

 6 marks


Name the causative agent of whooping cough (1mark)

 1 marks


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

a) Nicotine

b) Quinine

 2 marks


Give three distinguishing features of class Aves (3marks)

 3 marks


State two differences in the roots of Monocotyledonae and Dicotyledonae?

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

 2 marks


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

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



 3 marks


Define the term:

1) Greenhouse effect (1mark)

2) Global warming (1mark)

 2 marks


(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


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


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

i) Nodes of Ranvier

ii) Myelin Sheath

 2 marks


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

 3 marks


(a) Define non disjunction? (1 mark)

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

 3 marks


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

 2 marks


State how herbaceous plants obtain their support

 3 marks

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