Question

m-RNA is synthesizes on DNA template in which direction:

• A. $5^{\prime }\to 3^{\prime }$
• B. $3^{\prime }\to 5^{\prime }$
• C. Both
• D. Any

Answer 1

Answer: (A)

$5^{\prime }\to 3^{\prime }$

• The RNA polymerase reads the template DNA strand in the direction 3' to 5' direction.
• But the messenger RNA is formed in the 5' to 3' direction.
  
• The mRNA is single-stranded
• And it only contains three possible reading frames, out of which one is translated.

So, the correct option is '5′→3′'