NEET Solved Paper 2018 Question 4
Question: Pollen grains can be stored for several years in liquid nitrogen having a temperature of [NEET - 2018]
Options:
A) $ \text{–196 }{}^\circ\text{ C} $
B) $ \text{–80 }{}^\circ\text{ C} $
C) $ \text{–120 }{}^\circ\text{ C} $
D) $ \text{–160 }{}^\circ\text{ C} $
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Answer:
Correct Answer: A
Solution:
- Liquid nitrogen is commonly used for cryopreservation because it maintains a very low temperature of approximately -196°C, which helps in preserving biological samples like pollen grains for extended periods.