Question

Read the statements (A) and (B). Choose the right one.

(A) Synthesis of mRNA takes place in $5^{\prime }-3^{\prime }$ direction.
(B) Reading of mRNA is always in $3^{\prime }-5^{\prime }$ direction

• A. Both the statements (A) and (B) are wrong
• B. Statement (A) is wrong, (B) is correct
• C. Statement (B) is wrong, (A) is correct
• D. Both the statements (A) and (B) are correct

Answer 1

The correct option is C Statement (B) is wrong, (A) is correct

The antisense strand of DNA which runs from 3'-5' direction act as a template for RNA synthesis by RNA polymerase. So, the RNA is synthesised in 5'-3' direction. During translation, the ribosomes attach to the 5' end of the m-RNA and transcribe till the 3' end. So, the reading of mRNA takes place in 5'-3' direction.

So, the correct answer is option C.