Chemically, RNA is (i) reactive and (ii) stable as compared to DNA.

(i) equally,(ii) equally

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(i) less, (ii) more

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(i) more, (ii) less

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(i) more, (ii) equally

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Solution

The correct option is B (i) more, (ii) less
2OH group present in ribose sugar of every nucleaotide of RNA is a reactive group. Uracil present in RNA is less stable as compared to thymine (= methyl uracil) of DNA. Being unstable, RNA mutates at a much faster rate and there is no repairing system.Consequently, viruses having RNA genome and having shorter life span mutate and evolve faster.

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