MHT CET Biology question

From the experiments carried out by Avery, Macleod and McCarty by using various enzymes, which of the following results prominently proved that DNA is the transforming material?

(A)DNA of heat killed ‘S' + R type +DNAase → avirulent strainCorrect
(B)DNA of heat killed ‘S' + R type +RNAase → virulent strain
(C)DNA of heat killed ‘S' + R type → virulent strain
(D)DNA of heat killed ‘S' + R type + Protease → virulent strain

Answer: (A)

Solution

Adding DNase destroys the DNA of heat-killed S cells, so transformation fails and the strain stays avirulent, proving

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Question ID VK-065344