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?
[amp_mcq option1=”Only one” option2=”Only two” option3=”All three” option4=”None” correct=”option3″]
This question was previously asked in
UPSC IAS – 2023
2. **Some microorganisms can grow in environments with temperature below the freezing point of water:** This is correct. Psychrophiles are extremophilic microorganisms that are capable of growth and reproduction in cold temperatures, typically between -15°C and 10°C. They are found in environments like polar ice, glaciers, permafrost, and the deep sea.
3. **Some microorganisms can grow in highly acidic environment with a pH below 3:** This is correct. Acidophiles are extremophilic microorganisms that thrive in highly acidic environments, with optimum pH levels typically between 0 and 3. Examples include species found in acid mine drainage or volcanic sulfur springs.