A DNA template strand has the sequence 3'-TACGGT-5'. What is the sequence of the mRNA transcribed from it?
Answer and explanation
Correct answer: D. 5'-AUGCCA-3'
- Step 1: Pair each base: T with A, A with U (in RNA), C with G, G with C, G with C, T with A.
- Step 2: The mRNA is AUGCCA, written .
Answer
5'-AUGCCA-3'.
Why not the others: 5'-ATGCCA-3': contains thymine, which is not present in RNA. 5'-UACGGU-3': copies the template instead of complementing it. 5'-ACCGUA-3': reverses the order of the correct sequence.
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