UPSC Biology PYQs - 1
Previous Year Questions with Detailed Explanations
Total Questions: 1
Q.222
UPSC 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?
A
Only one
B
Only two
C
All three
D
None
💡 Detailed Explanation
- Certain microorganisms called hyperthermophiles can survive above 100°C.
- They are commonly found near hydrothermal vents and hot springs.
- Some microorganisms called psychrophiles survive below 0°C.
- They are found in glaciers, polar regions and deep oceans.
- Many microorganisms can live in highly acidic conditions.
- Examples include acidophilic archaea and bacteria.
- Some species can survive at pH values lower than 3.
- Extreme environments are collectively called extremophile habitats.
- All three statements are scientifically correct.
- Therefore, the correct answer is 'All three'.