A Double-Stranded DNA Molecule Contains a Total of 120 Purines

question 69

Multiple Choice

A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines. This DNA molecule could be composed of

• A) 120 adenine and 120 uracil molecules.
• B) 120 thymine and 120 adenine molecules.
• C) 120 cytosine and 120 thymine molecules.
• D) 120 adenine and 120 cytosine molecules.
• E) 120 guanine and 120 thymine molecules.

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