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  4. Cryopreservation is done at temperature :

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Q. Cryopreservation is done at temperature :

Delhi UMET/DPMTDelhi UMET/DPMT 2003

Solution:

Cryopreservation involves storage of cells from embryo and shoot tips in liquid nitrogen at $ -196^{\circ}C $ . This stops all metabolic process, which means that material can be preserved indefinitely assuming no mechanical failure of the storage system.