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JAMB UTME Biology 2001 past questions and answers

This 2001 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 2001 set with instant marking.

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Sample JAMB UTME Biology 2001 questions

1. Which statement is part of the cell theory?
  1. All living cells arise from pre-existing cells
  2. Every cell contains a nucleus
  3. Cells occur only in animals and plants
  4. All cells are visible without a microscope

Answer: A. All living cells arise from pre-existing cells

Cell theory states that cells come from pre-existing cells, in addition to being the basic units of life.

2. A plant cell placed in distilled water becomes firm mainly because water enters it by
  1. active transport through the cell wall
  2. osmosis across the selectively permeable cell membrane
  3. diffusion of dissolved salts into the vacuole
  4. transpiration through the cytoplasm

Answer: B. osmosis across the selectively permeable cell membrane

Water moves by osmosis from the dilute external solution into the cell sap, increasing turgor.

3. An object measuring 0.4 mm appears 8 mm long in a drawing; what is the magnification?
  1. 0.05 times
  2. 3.2 times
  3. 20 times
  4. 32 times

Answer: C. 20 times

Magnification is image size divided by actual size, so 8 mm / 0.4 mm = 20 times.

4. Which feature is characteristic of a bacterium but not of a typical plant cell?
  1. A cell membrane
  2. Cytoplasm containing ribosomes
  3. A cell wall
  4. Genetic material not enclosed in a nuclear membrane

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

Bacteria are prokaryotes whose genetic material is not enclosed in a membrane-bound nucleus.

5. Why does boiling usually stop an enzyme from catalysing a reaction?
  1. Heat changes the shape of its active site
  2. Heat converts the enzyme into a carbohydrate
  3. The enzyme uses up all the substrate
  4. The reaction becomes independent of temperature

Answer: A. Heat changes the shape of its active site

High temperatures denature many enzymes, changing the active site so the substrate no longer fits.

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