UPSC Previous Year Question | Prelims GS | 2023

Consider the following statements: 1. Some microorganisms can grow in environments with temperature above the boiling point of water. 2. Some microorganisms can grow in environments with temperature below the freezing point of water. 3. Some microorganisms can grow in highly acidic environment with a pH below 3. How many of the above statements are correct?

  1. Only one
  2. Only two
  3. All three
  4. None

Answer

Correct Answer

All three

Explanation

Extremophile microorganisms include hyperthermophiles (growing above 100°C), psychrophiles (growing below 0°C), and acidophiles (growing at pH below 3), so all three statements are correct.

Topics: extremophiles, microbial adaptation, microbiology, science and technology