Forest ServicesQ13. 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?
Detailed Solution
1. Statement 1 is correct: Thermophilic and hyperthermophilic microorganisms, particularly archaea, can thrive in extremely hot environments. For example, Pyrolobus fumarii can grow at temperatures up to 113°C, well above the boiling point of water.
2. Statement 2 is correct: Psychrophilic or cryophilic microorganisms are extremophiles that can grow and reproduce in cold temperatures, including those below the freezing point of water (e.g., in polar regions or deep-sea environments).
3. Statement 3 is correct: Acidophilic microorganisms are adapted to highly acidic conditions. Extreme acidophiles can grow optimally at pH values below 3, found in environments like acid mine drainage or volcanic hot springs. Therefore, all three statements are correct.
Current Affairs Link
Microorganisms and their properties are repeatedly asked by UPSC.
More Environment & Ecology Questions
Q4. Consider the following: I. Cigarette butts II. Eyeglass lenses III. Car tyres How many of them conta...
CQ5. Consider the following substances: I. Ethanol II. Nitroglycerine III. Urea Coal gasification technol...
BQ18. Consider the following statements: I. Carbon dioxide (CO2) emissions in India are less than 0.5 t CO...
CQ10. Consider the following statements: Statement I: Activated carbon is a good and an attractive tool to...
AQ11. Consider the following statements: Statement I: Studies indicate that carbon dioxide emissions from ...
AMore from UPSC 2023 GS1
Q1. With reference to Money Bill, consider the following statements: 1. All money bills are financial bi...
BQ2. Consider the following statements: Once the Central Government notifies an area as a 'Community Rese...
CQ3. With reference to 'Scheduled Areas' in India, consider the following statements: 1. Within a State, ...
BQ4. The provisions in the Fifth Schedule and Sixth Schedule in the Constitution of India are related to ...
BQ5. Consider the following statements: Statement-I: The Supreme Court of India has held in some judgemen...
CAce UPSC with AI-powered Practice
LearnPro's test series adapts to your weak topics and shows real analytics.
Explore Courses →