A DNA template strand reads 3'-TACGGA-5'. What is the mRNA sequence produced?

Answer and explanation

Correct answer: A. 5'-AUGCCU-3'

  1. Step 1: Pair each base: T-A, A-U, C-G, G-C, G-C, A-U. Step 2. That gives AUGCCU, read 5' to 3'. Answer: 5'-AUGCCU-3'. Why not the others: mRNA has U in place of T.

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