WAEC Biology Past Questions And Answers - Biology

Waec Biology Questions

Question 11:

WAEC 1989

Four cells with osmotic potential equivalent to that of 3% salt solution were immersed respectively in solutions
of different concentrations labeled as follows: I = 4% salt solution; II = 6% salt solution III = 1% salt solution;
IV = 10% salt solution; V = 5% salt solution. Which of the solutions will cause an increase in osmotic
pressure within the cell?

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A I
B II
C III
D IV
E V

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Question 12:

WAEC 1989

Which of the following statements is not true of osmotic process?

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A There must be a selectively permeable membrane
B The two solutions must be of different concentrations initially
C T involves only the movement of water molecules
D Equilibrium is reached when there is equal distribution of water molecules
E . The two solutions are of equal concentration at the beginning of experiment.

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Question 13:

WAEC 1989

Which of the following is the correct route for the movement of materials through the kidney?

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A Glomerulus â†’ Bowmanâ€™s capsule â†’ Loop of Henle â†’ Collecting tubule â†’ Pelvis
B Glomerulus → Loop of Henle → Collecting tubule → Bowman’s capsule → Pelvis
C Pelvis â†’ Bowmanâ€™s capsule â†’ Glomerulus â†’Loop of Henle â†’ Collecting tubule
D Bowmanâ€™s capsule â†’ Glomerulus â†’ Loop of Henle â†’ Collecting tubule â†’ Pelvis
E Bowmanâ€™s capsule â†’ Loop of Henle â†’Glomerulus â†’ Collecting tubule â†’ Pelvis

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Question 14:

WAEC 1989

Which of the following is the function of the hormone in the lslets of Langerhans?

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