Question

Regarding the assertion and reason, select the correct option.

Assertion [A]: The template strand runs in the 3’-5’ direction.
Reason [R]: The genetic information resides on the sense strand.

• A. Both A and R are true and R explains A
• B. Both A and R are true, but R does not explain A
• C. A is true and R is false
• D. Both A and R are false

Answer 1

The correct option is A Both A and R are true and R explains A

During transcription, one of the two DNA strands of the double helix acts as a template for the synthesis of mRNA. This is known as the template strand or antisense strand, and runs along the 3’-5’ direction. The other DNA strand which runs in the 5’-3’ direction is known as the coding strand or sense strand. This appears exactly like the newly transcribed mRNA strand (except that ‘T’ and ‘U’ would differ respectively).