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CBSE Class 12 · 2009 · All India · BiomoleculesShort Answer

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Name the four bases present in DNA. Which one of these is not present in RNA?

Answer: Adenine, guanine, cytosine, thymine; thymine is absent from RNA (replaced by uracil).

Solution

DNA's bases: \textbf{adenine (A), guanine (G), cytosine (C), thymine (T)}.
RNA lacks \textbf{thymine} — uracil (U) takes its place.

CBSE Class 12 Board · 2009 · All India · Subjective

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