Question

A region of coding strand of DNA has the following nucleotide sequence-

5'- ATGCGGC - 3'

The sequence of bases on mRNA transcribed by this would be :

• A. 3' – AUGCGGC – 3'
• B. 3' – TACGCCG – 5'
• C. 5' – TACGCCG – 3'
• D. 5' – AUGCGGC – 3'

Answer 1

The correct option is D 5' – AUGCGGC – 3'

The sequence in strands in DNA with polarity 5' → 3' and the sequence in mRNA remains same except uracil in the place of thymine.

According to given question,

5'-ATGCGGC-3' (coding strand of DNA)
$\downarrow$
5'-AUGCGGC-3' (mRNA)