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Discovery of DNA › View

What feature did Hershey and Chase use to differentiate between the protein and nucleic acid in their experiment?

A. Proteins have phosphorus and nucleic acids have sulfur

B. Proteins have sulfur and nucleic acids have phosphorus

C. Proteins are single stranded and nucleic acids are double stranded

D. Proteins are double stranded and nucleic acids are single stranded

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Microbiology › View

How are pyrimidines structurally different from purines in DNA nucleotides?

A. Pyrimidines have a double-ring structure, while purines have a single-ring structure.

B. Pyrimidines and purines both have a double-ring structure.

C. Pyrimidines have a single-ring structure, while purines have a double-ring structure.

D. Pyrimidines and purines both have a single-ring structure.

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