Updated: Question in GATE 2012 Biotechnology (BT) Question Paper

A question in GATE 2012 Bio Technology Paper with Solution has been updated:

Dimethyl sulfoxide (DMSO) is used as a cryopreservant for mammalian cell cultures because

1. It is also utilized as a nutrient
2. It easily penetrates cells
3. It protects cells by preventing crystallization of water
4. It is an organic solvent