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JAMB UTME Biology 2002 past questions and answers

This 2002 JAMB UTME Biology set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2002 set with instant marking.

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Sample JAMB UTME Biology 2002 questions

1. A piece of plant tissue is placed in a concentrated salt solution. Which change is most likely to occur in its cells?
  1. The protoplast shrinks away from the cell wall
  2. The cell wall dissolves
  3. The vacuole absorbs more water
  4. The cells divide rapidly

Answer: A. The protoplast shrinks away from the cell wall

Water leaves the cells by osmosis into the more concentrated solution, causing plasmolysis.

2. During the light-dependent reactions of photosynthesis, the oxygen released by a green plant comes directly from the splitting of
  1. carbon dioxide
  2. water
  3. glucose
  4. chlorophyll

Answer: B. water

Photolysis splits water molecules and releases oxygen during the light-dependent stage.

3. Which description best defines osmosis?
  1. Movement of solute particles from low to high concentration using energy
  2. Movement of all particles from high to low concentration without a membrane
  3. Net movement of water through a selectively permeable membrane from higher to lower water potential
  4. Movement of water molecules only through a fully permeable cell wall

Answer: C. Net movement of water through a selectively permeable membrane from higher to lower water potential

Osmosis is the net movement of water through a selectively permeable membrane down a water-potential gradient.

4. Which feature is characteristic of a prokaryotic cell?
  1. A membrane-bound nucleus containing chromosomes
  2. Mitochondria with folded inner membranes
  3. Chloroplasts containing grana
  4. Genetic material not enclosed by a nuclear membrane

Answer: D. Genetic material not enclosed by a nuclear membrane

Prokaryotes lack a membrane-bound nucleus, so their genetic material lies in the cytoplasm.

5. A body cell with 12 chromosomes undergoes normal mitosis. How many chromosomes will each daughter cell contain?
  1. 12
  2. 6
  3. 24
  4. 3

Answer: A. 12

Mitosis preserves chromosome number, so each daughter cell receives 12 chromosomes.

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