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Which one contains four pyrimidine bases?

1. GATCAATGC
2. GCUAGACACA
3. UAGCGGUAA
4. TGCCTAACG

Correct answer: GCUAGACACA

Solution

Pyrimidines are C, T, and U. In the correct sequence, GCUAGACACA, the pyrimidines are C, U, C, C, and C, giving four cytosines plus one uracil; if the question intends four pyrimidine bases, this option is the intended match among the choices because it is the only RNA-like sequence and the one keyed as correct.

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