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Hershey and Chase labelled phage DNA with radioactive:

ACarbon 14
BNitrogen 15
CPhosphorus 32
DSulfur 35
Answer & Solution
Correct answer: C. Phosphorus 32
1. Sulfur 35 labelled the protein coat. 2. Phosphorus is in DNA but not protein. 3. Only phosphorus 32 entered the bacteria. _Source: OpenStax Biology 2e, Chapter 14, DNA Structure and Function (CC BY 4.0)._
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