Question

mRNA is synthesised on DNA template in which direction?

• A. $5^{{}^{\prime }}\to 3^{{}^{\prime }}$
• B. $3^{{}^{\prime }}\to 5^{{}^{\prime }}$
• C. Both (a) and (b)
• D. None of these

Answer 1

Answer: (A)

$mRNA$ is synthesised on DNA template. RNA synthesis requires accurate and efficient initiation, elongation proceeds in the $5^{{}^{\prime }}\to 3^{{}^{\prime }}$ direction (i.e., the polymerase moves along the template strand of DNA in the $5^{{}^{\prime }}\to 3^{{}^{\prime }}$ direction), and RNA synthesis requires distinct and accurate termination.