WAEC 2014 Biology · Question 10

Which of the following cell inclusions can destroy other cell organelles?

Options

  1. A.Centriole
  2. B.Ribosome
  3. C.Lysosome
  4. D.Mitochondrion

Answer: C. Lysosome

Explanation written with AI and checked against the answer key

Step 1: Analyze the question The question asks which cell structure can destroy other cell organelles. This points to a structure that contains digestive (hydrolytic) enzymes.

Step 2: Explain the concept Each option has a different function:

  • Centriole: Helps organize spindle fibres during cell division.
  • Ribosome: Makes proteins (protein synthesis).
  • Lysosome: A membrane-bound sac filled with hydrolytic (digestive) enzymes. It breaks down worn-out organelles (autophagy), food particles, and foreign matter. If the lysosome bursts, the enzymes can digest the whole cell (autolysis). This is why it is nicknamed the "suicide bag."
  • Mitochondrion: Site of aerobic respiration, releasing energy as ATP. It is called the "powerhouse" of the cell.

Step 3: Solve Only the lysosome has the enzymes needed to break down other organelles. The other options build proteins, release energy, or assist in division. None of them digest cell parts.

Step 4: Answer The correct option is C. Lysosome.

Tip: Link "Lyso-" with "lysis," which means breaking down or splitting. Lysosome = "breakdown body." Also remember "suicide bag" for lysosomes, since this phrase often appears in WASSCE and JAMB questions.

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