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State PCS PYQPrelims 2024

BPSC – Combined Competitive Examination · Question 143

The process of breaking down organic matter by microorganisms is called:

  1. Respiration
  2. Photosynthesis
  3. Decomposition
  4. Fermentation
Show answer & explanation

Answer: (C) Decomposition

Explanation

Bacteria and fungi decompose dead matter, recycling nutrients.

  • (A) Incorrect

    Wrong: respiration releases energy from food in cells.

  • (B) Incorrect

    Wrong: builds organic matter, not breaks it.

  • (C) Correct

    Correct: decomposers break dead organic matter into simpler substances.

  • (D) Incorrect

    Wrong: a specific anaerobic process, not general breakdown.