Question

The microorganism which can grow between 0.1 to 50 MPa pressure are called

• A. Eurybaric
• B. Barophile
• C. Baroduric
• D. Barotolerant

Hint:

Barotolerant organisms grow normally at atmospheric pressure ($0.1\,\text{MPa}$) and tolerate up to $50\,\text{MPa}$; Barophiles require high pressure ($> 40\,\text{MPa}$).

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Microorganisms are categorized based on their growth capability and metabolic tolerance across hydrostatic pressure gradients.

Step 2: Detailed Explanation:
1. Barotolerant (piezotolerant): Organisms capable of growing at atmospheric pressure ($0.1\,\text{MPa}$) as well as moderately elevated hydrostatic pressures up to $50\text{--}60\,\text{MPa}$.
2. Barophiles (piezophiles): Obligate high-pressure organisms that require high hydrostatic pressure ($> 40\text{--}50\,\text{MPa}$) for optimal growth.
3. Baroduric: Organisms that survive high pressure exposure but do not grow.

Step 3: Final Answer:
Therefore, microorganisms that grow from 0.1 to 50 MPa are called barotolerant.