During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG then the…

During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG then the nucleotide sequence in the $m$ RNA would be:
  1. TATGC
  2. TCTGG
  3. UAUGC
  4. UATGC.

Solution

Template strand only serves as the template for transcription whereas coding strand contains the exact same sequence of nucleotides in the mRNA except thymine. Coding DNA strand 5'-ATACG-3' Template DNA strand 3'-TATGC-5' mRNA synthesised 5'-UAUGC-3' Caution The direction of the template strand is in 3' to 5', whereas the coding strand shows opposite directional polarity, i.e., $5^{\prime}$ to $3^{\prime}$ direction.

Asked in: NEET 2004

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