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Q.

Which scientists worked to determine the biochemical nature of ‘transforming principle’ of Griffith's experiment?

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a

Temin and Baltimore

b

Meselson and Stahl

c

Avery, McLeod and MacCarty

d

Bateson

answer is C.

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Detailed Solution

Avery, McLeod and MacCarty worked to determine the biochemical nature of ‘transforming principle’ in Griffith's experiment. They discovered that protein-digesting enzymes (proteases) and RNA-digesting enzymes (RNases) did not affect transformation, so the transforming substance was not a protein or RNA. Digestion with DNase did inhibit transformation, suggesting that the DNA caused the transformation. They concluded that DNA is the hereditary material, but not all biologists were convinced.
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