Biology Paper 1 Question Paper
KCSE CLUSTER TESTS 20
Biology Paper 1
Name the branch of biology that deals with the study of cells in the body of organisms.
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1 marks
Why is that a father can only transmit haemophilia to his daughter but not to his son?
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1 marks
Explain why amoeba does not have a specialized structure for gaseous exchange.
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1 marks
The table below gives the information about an aquarium community that is ecologically balanced.
Draw a food web using six arrows to show the feeding relationship among the organisms.
1 marks
Name the organelles that
i) Secretes mucin- glycoproteins
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ii) Provides the site of protein synthesis
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iii) Destroys disease causing micro-organisms
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3 marks
a) Write two structural differences between red blood cells and white cells.
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b) What is the role of the following in blood clotting process?
i) Thromboplastin
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ii) Calcium ions
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5 marks
Distinguish between homologous and
a) Analogous structures
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b) Give two advantages of natural selection
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4 marks
The diagram below shows part of a flower
a) Name the part labeled Q
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b) State the function of R
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c) State the type of ovary the flower has
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d) Give a reason for your answer in (c) above.
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4 marks
Explain why an athlete after winning 100metres race breath move quickly and deeply.
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3 marks
Describe the sequences of events that occur in the eye for one to be able to see clearly if one moves from a dark room to a bright light.
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3 marks
Study the diagrams below and answer the questions that follows
a) What was the aim of the experiment
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b) Explain why leaf A is still attached onto the plant.
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c) What property of sodium hydroxide enables it to carry out its intended role?
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d) In the test for starch in either leaf A or B, name the role played by methylated spirit
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4 marks
What are the classes of the following organisms. (2mks)
a) Maggots
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b) Platypus
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4 marks
The diagram below is a mammalian bone.
a) State the function of the part labeled K and L.
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b) State the region of the body where this bone is found.
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3 marks
An animal is found to have large glomeruli and short loop of Henles. Account for the presence of
i) Large glomeruli (1mk)
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ii) Short loop of Henle (1mk)
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iii) State the possible aquatic habitat (1mk)
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3 marks
a) Name a growth inhibitor in seeds;
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b) Apart from radicle, name two other parts of a seed embryo
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3 marks
a) Define the following terms as used in microscopy (2mks)
i) Resolution
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ii) Field of view
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b) State functional disadvantage of electron microscope
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3 marks
Two equal strips A and B were from a potato whose cell was 30% of sugar. The strip A was placed in a solution of 10% sugar concentration while strip B was placed in 50% sugar concentration. a) What change was expected in strips A and B?
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b) Account for the change in strip A.
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4 marks
The lungs and ileum are adapted for absorption. State three features they have in common which facilitate absorption.
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3 marks
a) Ascaris lumbroides is an endo-parasiteLiving in the ileum of human beings, while Tagetes minutes is a notorious weed in our farms. Identify the generic parts of the organisms mentioned.
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b) Under which circumstances are two organisms considered to belong to same species.
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4 marks
What would happen if a person produced
a) Less anti-diuretic hormone?
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b) What term is given to the condition described in (a) above?
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4 marks
a) State the role played by jelly like substances surrounding egg laid by frogs
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b) Describe what happens when sperm head hit the egg in human beings.
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4 marks
Name the causative agent of the following diseases:
a) Amoebic dysentery
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b) Tuberculosis
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4 marks
Describe how saturation deficit affect the rate of transpiration
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1 marks
a) The length from the tail tip to the anus in a fish is 8cm whereas that from the tail tip to the mouth tip is 24cm. Calculate the tail power of the fish
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b) What is the significance of the high tail power in fish locomotion
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1 marks
Use the graph below to answer the questions that follows:
a) Calculate the difference in nitrate concentration between the highest and lowest.
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b) How can increase in nitrate concentration in the river lead to death of fish?
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c) Suggest a possible source of nitrate that lead to the pollution in river.
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3 marks
Name the type of joints formed when bones articulate at the following parts
i) Acetabulum
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ii) Sigmoid notch
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3 marks
a) Name the structures labeled 3,4
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b) State the function of the parts labeled 5 and 7.
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4 marks