Regarding the Structure of Bases in Nucleic Acids, Which, If

question 7

Multiple Choice

Regarding the structure of bases in nucleic acids, which, if any, of the following statements is incorrect?

• A) Pyrimidines have a single heterocylic ring consisting of four carbon atoms plus two nitrogen atoms that are linked to the same carbonyl (-C=O) group
• B) Purines have two heterocyclic rings, each with two nitrogen atoms
• C) Thymine = 5-methyluracil.
• D) Purines carry an amino group, unlike pyrimidines

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