Question:
Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R)
Assertion (A) : Germplasm can be preserved for longer period under cryopreservation at $-296^{\circ}\text{C}$.
Reason (R) : There is minimal loss of genetic information through cryopreservation
In light of above statements, choose the most appropriate answers from the options given below.
Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R)
Assertion (A) : Germplasm can be preserved for longer period under cryopreservation at $-296^{\circ}\text{C}$.
Reason (R) : There is minimal loss of genetic information through cryopreservation
In light of above statements, choose the most appropriate answers from the options given below.
Assertion (A) : Germplasm can be preserved for longer period under cryopreservation at $-296^{\circ}\text{C}$.
Reason (R) : There is minimal loss of genetic information through cryopreservation
In light of above statements, choose the most appropriate answers from the options given below.
Show Hint
Always double-check scientific values in Assertion-Reason questions.
The temperature for liquid nitrogen storage is always $-196^{\circ}\text{C}$.
Spotting $-296^{\circ}\text{C}$ as physically impossible makes solving this question very straightforward.
The temperature for liquid nitrogen storage is always $-196^{\circ}\text{C}$.
Spotting $-296^{\circ}\text{C}$ as physically impossible makes solving this question very straightforward.
Updated On: Jul 23, 2026
- Both (A) and (R) are correct and (R) is the correct explanation of (A).
- Both (A) and (R) are correct but (R) is not the correct explanation of (A).
- (A) is correct but (R) is not correct
- (A) is not correct but (R) is correct
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
This question focuses on cryopreservation, which is a method of preserving cells, tissues, or organs at ultra-low temperatures to maintain their viability and genetic stability over long periods.
Step 2: Detailed Explanation:
Let us evaluate both statements:
Assertion (A): "Germplasm can be preserved for longer period under cryopreservation at $-296^{\circ\text{C}$."}
This statement is incorrect.
In physics, absolute zero is the lowest possible temperature, defined as $-273.15^{\circ}\text{C}$ ($0\text{ K}$).
Therefore, a temperature of $-296^{\circ}\text{C}$ is physically impossible.
Cryopreservation is actually carried out in liquid nitrogen at a temperature of $-196^{\circ}\text{C}$ ($77\text{ K}$).
At this temperature, all metabolic and biochemical processes are virtually arrested, allowing for long-term storage.
Because of this physical error, Assertion (A) is false.
Reason (R): "There is minimal loss of genetic information through cryopreservation"
This statement is correct.
Because metabolic activity and cell division are suspended at $-196^{\circ}\text{C}$, genetic changes, mutations, and cellular decay are prevented.
This ensures the stored germplasm remains genetically stable over long periods.
Step 3: Final Answer:
Assertion (A) is incorrect, but Reason (R) is correct.
This corresponds to Option (D).
This question focuses on cryopreservation, which is a method of preserving cells, tissues, or organs at ultra-low temperatures to maintain their viability and genetic stability over long periods.
Step 2: Detailed Explanation:
Let us evaluate both statements:
Assertion (A): "Germplasm can be preserved for longer period under cryopreservation at $-296^{\circ\text{C}$."}
This statement is incorrect.
In physics, absolute zero is the lowest possible temperature, defined as $-273.15^{\circ}\text{C}$ ($0\text{ K}$).
Therefore, a temperature of $-296^{\circ}\text{C}$ is physically impossible.
Cryopreservation is actually carried out in liquid nitrogen at a temperature of $-196^{\circ}\text{C}$ ($77\text{ K}$).
At this temperature, all metabolic and biochemical processes are virtually arrested, allowing for long-term storage.
Because of this physical error, Assertion (A) is false.
Reason (R): "There is minimal loss of genetic information through cryopreservation"
This statement is correct.
Because metabolic activity and cell division are suspended at $-196^{\circ}\text{C}$, genetic changes, mutations, and cellular decay are prevented.
This ensures the stored germplasm remains genetically stable over long periods.
Step 3: Final Answer:
Assertion (A) is incorrect, but Reason (R) is correct.
This corresponds to Option (D).
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