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ALLIANCE GIRLS HIGH SCHOOL
BIOLOGY PAPER 2
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AlLIANCE GIRLS’ HIGH SCHOOL Mock Examination 2019
Form Four
1. Two metabolic processes; A and B occurring in living cells are summarized below.
(a) Name the group ofliving organisms in which process B occurs. (1mk)
(b) Identify the two metabolic processes represented by letters A and B. (2mks)
A
B
( c) Where does stage 1 take place in a cell. (1mk)
( d) (i) In which organelle does stage II occur? (1mk)
ii) State two adaptation of this organelle for this metabolic process. (2mks)
( e) What do you. understand by the term oxygen debt? (1mark)
2.(a) Describe briefly how eye structures adjust to focus near objects sharply on the retina. (3 marks)
(b)The diagram below shows an eye exposed to two different conditions. Study it to answer the questions that follow.
i) State the conditions labeled A and B
A (1 mark)
B (1mark)
(ii)Naming muscle X and Y, explain how events in condition B takes place and its significance. ( 3 marks)
3. (a) What do you understand by the following terms as used in genetics:
(i) Genetic engineering . (1 mark)
(ii) Hybrid vigour. (1 mark)
(b) Tallness in pea plants is due to a dominant gene. Two tall pea plants were presented to a certain scientist to ascertain their genotypes, one was homozygous tall while the other was heterozygous tall. Show how the scientist would solve the mystery of knowing the identity of at least one of the plant (4marks)
(b) State two application of knowledge in genetics in medicine genetics by man. (2marks)
4. (a) Define deplasmolysis. (1 mark)
(b) The cells of a herbaceous plant were found to have an average diameter of2.5µm. the cells were placed in varying concentrations of sucrose solution. The average diameter of the cells in each solution was determined and the results obtained were as shown in the table below
(i) From these results, determine the concentration of the cell sap . (1mk)
(ii) What term is given to the sucrose solution whose concentration is equal to that of the cell sap? (1mk)
(iii) Give an explanation for the average diameter of the cells placed in 1 % sucrose solution compared with the normal diameter of the cells. (3 marks)
(iv) Describe the difference in appearance between the cell cytoplasm before and after being placed in 15% sucrose solution (2marks)
5. a) State three homeostatic roles of the mammalian kidney. (3marks)
(b) Two samples of blood were obtained from James; one from the boy’s hepatic vein and the other from his hepatic portal vein. The tests showed that the blood from the hepatic vein had a high glucose level while that from the hepatic portal vein had no glucose.
(i) Name the hormone responsible for the difference in the glucose content in the two blood vessels. (1mark)
(ii) How did the hormone in (b)(i) above influence the blood glucose level in the hepatic vein?(2 marks)
(iii) State two other homeostatic roles of the liver. ( 2marks)
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2019 Alliance Girls End Term 2 Form 1, Form 2, Form 3 Past Papers