First slide

The Search for Genetic Material

Question

1. To establish the transforming principle as DNA, which enzymes were used by Avery et al?
I. DNAases II. RNAases
III. Proteases IV. Lipases

Easy

A

I, II, IV
B

III, II
C

I, II, III, IV
D

II, I, III

Solution

Avery etal isolated the biochemicals from heat killed S strain. These biochemicals were DNA, RNA and Protein. To establish which biochemical was responsible for converting R strain to S strain they used DNase, RNase and Protease and found no transformation of R strain to S strain when DNase was used which destroys DNA. When they used Proteases and RNase they found transformation.

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