In which direction m-RNA is synthesised on DNA template?
5′ → 3′
3′ → 5′
Both (a) and (b)
Any
Correct answer: 5′ → 3′
Solution
mRNA is synthesized by adding nucleotides to the 3′-OH of the growing RNA chain, so the strand elongates in the 5′ → 3′ direction. Because strands are antiparallel, the DNA template is read 3′ → 5′.