In the experiment of avery, mcleod, and mccarty, the addition of rnase and protease (but not dnase) to the dna extracts yielded which of the following outcome? select one: a. prevented the conversion of type s bacteria into type r bacteria. b. allowed the conversion of type s bacteria into type r bacteria. c. prevented the conversion of type r bacteria into type s bacteria. d. allowed the conversion of type r bacteria into type s bacteria.

The correct answer will be option-D

Explanation:

Avery, McLeod, and McCarty performed the experiment to test the chemical nature of the transforming principle.  

The transformation experiment was performed by the Griffith in 1928 which results in the transformation of the avirulent R bacteria strain to virulent S bacteria as S bacteria released a transforming chemical in the solution which transformed the R bacteria to S bacteria.

Since DNase help digest the DNA molecules present in the solution therefore this showed that the transforming principle which turned the R bacteria to S bacteria is DNA.

Thus, option-D is the correct answer.

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