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Molecular Basis of Inheritance question

2015 · Q60
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Molecular Basis of Inheritance question

2015 · Q60

NEETBiologyMolecular Basis of InheritanceMCQ+4 / −1
Which one of the following is not applicable to RNA?
  1. A
    Complementary base pairing
  2. B
    5' phosphoryl and 3' hydroxyl ends
  3. C
    Heterocyclic nitrogenous bases
  4. D
    Chargaff's rule
View written solutionFree

Correct answer: D

Chargaff’s rules are applicable only for double stranded DNA molecule. These are not applicable for single stranded DNA or RNA molecules. Chargaff’s rules state that DNA helices contain equal molar ratios of A and T, G and C. This is because in a ds DNA molecule, complementary base pairing occurs between A and T, and C and G base pairs. This complementary base pairing is not possible in case of single stranded RNA molecule. Thus, Chargaff’s rules are not applicable to RNA.

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