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Why did the use of Rnase not affect tran...

Why did the use of Rnase not affect transformation in the experiment conducted by Avery et al.

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The Rnase is an enzyme that destroys protein. Therefore DNA, RNA and proteins from heat killed S-strand of bacteria when added to .R.strain changed surface character and also made them pathogenic. The DNA is the transforming principle and not the proteins.
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