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Q.

When Avery et al incubated the living R cells of Pneumococcus with the pure biochemicals proteins, RNA and DNA , and treated this separately with proteases, RNases and DNases, they found that 

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a

DNases inhibited transformation

b

RNases inhibited transformation

c

Proteases inhibited transformation

d

RNases and proteases together inhibited transformation

answer is A.

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Detailed Solution

Since DNases destroyed DNA and inhibited or prevented transformation but not proteases and RNases, they established the chemical nature of genetic material as DNA. 

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