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KNEC KCSE Biology Paper 1 – 2014 Nakuru District Mock

KNEC KCSE Biology Paper 1 – 2014 Nakuru District Mock

2014 Nakuru District Mock

Biology Paper 1

Answer all questions.

State the name given to the study of
(a) Chemical changes in living organisms …………………………………………………..(1mark)
(b) Insects……………………………………………………………………….…………….( 1mark)

 2 marks


Below is a diagram of an organelle that is involved in respiration.

Biology Paper 1 Question Paper - 2014 Nakuru District Mock
(a) Name t he organelle ( 1mark)
(b) Name the part labeled X (1 mark)
(c) What is the purpose of the part labeled Y (1 mark)

 3 marks


Explain what would happen to an amoeba when placed in distilled water.

 3 marks


(a) State the category of variation into which the following traits fall (2 marks)
(i) Skin pigmentation
(ii) Blood group
(b) Give two possible genotypes of blood group A. (1 mark)

 3 marks


State three characteristics of monera that are not found in other kingdoms.

 3 marks


(a) Name two excretory products produced by both plants and animals (2 marks)

(b) What is the name given to the process in which excess amino acids are broken in the liver.(1 mark)

 3 marks


(a) What is meant by the following terms?
(i) Autoecology (1mark)
(ii) Habitat(1mark)
(b) State two ways in which floating leaves of aquatic plants are adapted to gaseous exchange

 4 marks


In an experiment to investigate a certain factor necessary for photosynthesis, a leaf shown below
was used.

Biology Paper 1 Question Paper - 2014 Nakuru District Mock
(a) What was the aim of the experiment? (1 mark)

(b) What term is used to describe such a leaf? (1 mark)
(c) In the space provided below, sketch the expected observations when starch test is carried on the
leaf (2 marks)

 4 marks


The equation below represents a chemical process which occurs in the mammalian body
2H2O2 → 2H2O + 2O2
Name the;
(a) Enzyme that controls the reaction(1 mark)
(b) Major organ in which the reaction occurs( 1mark)
(c) What is the importance of the process? ( 1mark)

 3 marks


Name the hormones which control the following
(a) Development of male secondary characteristic(1 mark)
(b) Inhibits side branching in plants (1 mark)
(c) Moulting in insects ( 1mark)

 3 marks


During a biological excursion a group of form three students collected a plant specimen,
whose reproductive organ is shown below.

Biology Paper 1 Question Paper - 2014 Nakuru District Mock

(a) Name the sub-division of the plant from which the above specimen was obtained (1 mark)

(b) Other than the presence of the above characteristic, state two characteristics of the plants in the
sub-division name above ( 2 marks)

 3 marks


The shirt of a student was stained by a solution of DCPIP. A friend advised him to wash
with lemon juice. Explain.

 2 marks


(a) State one distinguishing feature of fungal cells (1 mark)

(b) State one similarity between members of kingdom animalia and fungi ( 1mark)

 2 marks


State the functions of each of the following parts of the axial skeleton
(a) Odontoid process (1 mark)

(b) Zygapophyses (1 mark)

 2 marks


Antibiotics are used to treat people with bacterial infections. Explain the danger of the widespread use of antibiotics to treat disease.

 3 marks


(a)(i) Identify the plant support structure illustrated below ( 1 mark)

Biology Paper 1 Question Paper - 2014 Nakuru District Mock

(ii) Name the part labeled C (1mark)
(b) State three biological importance of tropism in plants (3 marks)

 5 marks


(a) Define the term oxygen debt (2 marks)
(b) State what happens to the lactic acid produced by active muscles during anaerobic
respiration (2 marks)

 4 marks


Give a reason for each of the following
(a) The trachea of the tracheal system have circular rings of chitin ( 1 mark)

(b) Tracheoles of the tracheal system lacks rings of chitin (1 mark)

 2 marks


(a) What is the meaning of the term organic evolution? (2 marks)

(b) Explain the following terms;
(i) Analogous structures (1 mark)

(ii) Comparative embryology (1 mark)

 4 marks


The figure below represents a type of muscle.

Biology Paper 1 Question Paper - 2014 Nakuru District Mock
(a)(i) Identify the type of muscle (1 mark)
(ii) Give one reason for your answer in (a)(i) above (1mark)

(b) Name two parts of the human body where this type of muscle can be found. (2marks)

 4 marks


Describe how turgor pressure builds up.

 3 marks


Name the flower part that produces male gamets.

 1 marks


(a) The diagram below shows a cell undergoing a stage in cell division

Biology Paper 1 Question Paper - 2014 Nakuru District Mock

(a) With reason, identify this stage (2 marks)
(b) Draw a diagram to show the next stage of cell division (1mark)

 3 marks


Name the parts of the brain that perform the following functions
(a) Controls secretion of hormones by pituitary glands (1 mark)
(b) Controls muscular movements body posture and balance (1mark)
(c) Controls reflex activities( 1mark)

 3 marks


Name the vector and causal organism of bilharzia.

 2 marks


(a) Name an end product of photosynthesis that may be found in the intercellular air spaces of
a leaf.(1 mark)
(b) State what happens to the product named in (a) above. (2 marks)

 3 marks


Name two structures in the mammalian ear that are used in body balance and posture.

 1 marks


What characteristics do gills of a fish and the mouth cavity of a frog have in common that
enables them to be efficient in gaseous exchange.

 3 marks

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