A) \[-{{140}^{o}}C\]
B) \[-{{120}^{o}}C\]
C) \[-{{196}^{o}}C\]
D) \[-{{273}^{o}}C\]
Correct Answer: C
Solution :
Cryopreservation involves storage of cells from embryo and shoot tips in liquid nitrogen at \[-{{196}^{o}}C\]. This stops all metabolic process, which means that material can be preserved indefinitely assuming no mechanical failure of the storage system.
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