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JAMB Biology 2015 past questions and answers

2 questions. Try each one, then open the answer to check yourself and read the explanation.

Question 3

Cell Structure and Organisation

The part of the cell solely responsible for respiration is the

  1. A.nucleus
  2. B.nucleolus
  3. C.mitochondria
  4. D.golgi apparatus.
Show the answer and explanation

Answer: C (mitochondria)

Explanation

Mitochondria carry out aerobic respiration and release most of the cell's energy as ATP, which is why they are called the powerhouse of the cell.

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Question 34

Soil

The diagram on the left represents an experiment with two types of soil. The experiment demonstrates

Diagram for this question
  1. A.soil attraction for water
  2. B.soil porosity
  3. C.soil capillarity
  4. D.draining capacity of soils.
Show the answer and explanation

Answer: C (soil capillarity)

Explanation

Water rises up the soil columns from the dish below, to different heights in the two soils; this upward movement of water through small pores is capillarity.

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