Assertion: Adenine cannot pair with cytosine. Reason: This is because there would be two hydrogen atoms one at the bonding positions and none at the other.

Question

Assertion: Adenine cannot pair with cytosine. Reason: This is because there would be two hydrogen atoms one at the bonding positions and none at the other. (A) If both Assertion and Reason are true, and Reason is a correct explanation of the Assertion (B) If both Assertion and Reason are true, but Reason is not a correct explanation of the Assertion (C) If Assertion is true, but Reason is false (D) If both Assertion and Reason are false

Tardigrade Admin · Accepted Answer

The purine and pyrimidine bases pair only in certain combinations. Adenine pairs with thymine (A:T) and guanine with cytosine (G:C). Adenine and thymine are joined by two hydrogen bonds through atoms attached to positions 6' and 1'. Cytosine and guanine are joined by three hydrogen bonds through positions 6', 1' and 2'.

Q. Assertion: Adenine cannot pair with cytosine. Reason: This is because there would be two hydrogen atoms one at the bonding positions and none at the other.

If both Assertion and Reason are true, and Reason is a correct explanation of the Assertion

If both Assertion and Reason are true, but Reason is not a correct explanation of the Assertion

If Assertion is true, but Reason is false

If both Assertion and Reason are false

Q. Assertion: Adenine cannot pair with cytosine.
Reason: This is because there would be two hydrogen atoms one at the bonding positions and none at the other.