Question

Cryopreservation of plant material using liquid nitrogen (-196°C) for conservation eventualities is a

• A. Long-term strategy
• B. Short term
• C. Ad hoc strategy
• D. Medium term strategy

Hint:

Cryopreservation:
- Long-term conservation (-196°C).
- Used for germplasm storage.
- Metabolic activity is stopped completely.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This question tests knowledge of cryopreservation and conservation strategies.

Step 2: Detailed Explanation:
Cryopreservation using liquid nitrogen (-196°C) is a long-term strategy for conservation.
At this temperature, all metabolic activities stop, allowing indefinite storage.
It is used for the conservation of plant genetic resources.
Short term (B): Days to weeks.
Medium term (C): Months to years (e.g., slow growth culture).
Ad hoc strategy (D): Not a standard conservation strategy.
Thus, cryopreservation is a long-term strategy.

Step 3: Final Answer:
Thus, cryopreservation is a long-term strategy, which corresponds to option (A).
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