MDCAT Biology MCQ #854

During the synthesis of mRNA from a DNA template containing the sequence 3'-TAC-5', which sequence of ribonucleotides is correctly assembled by RNA polymerase?

MDCAT Biology MCQ #854

  1. Question 1

    Q1. During the synthesis of mRNA from a DNA template containing the sequence 3'-TAC-5', which sequence of ribonucleotides is correctly assembled by RNA polymerase?

    • A) 5'-ATG-3'
    • B) 5'-AUG-3'
    • C) 5'-UAC-3'
    • D) 5'-GUA-3'

    Answer: 5'-AUG-3'

    Explanation: RNA uses Uracil instead of Thymine; TAC on DNA pairs with AUG on mRNA. ATG is DNA, which RNA polymerase does not synthesize.