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Which one of the following is not applicable to RNA?

1. 5’ phosphoryl and 3’ hydroxyl ends
2. Heterocyclic nitrogenous bases
3. Chargaff’s rule
4. Complementary base pairing

Correct answer: Chargaff’s rule

Solution

Chargaff's rule is applicable to DNA, not RNA. It states that in a DNA molecule, the percentage of adenine is equal to the percentage of thymine, and the percentage of guanine is equal to the percentage of cytosine.

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