A) Complementary base pairing
B) 5' phosphoryl and 3' hydroxyl ends
C) Heterocyclic nitrogenous bases
D) Chargaff's rule
Correct Answer: D
Solution :
Chargaff's rule is not applicable to RNA. He is the generalizations formulated about DNA structure. The rule states that DNA from any cell of all organisms should have a 1:1 ratio (base pair rule) of pyrimidine and purine bases, i.e. the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine. Further complementary base pairing is sometimes, visible is RNA as well (in doubled stranded RNAs of viruses) hence option (a) is not taken into consideration.
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