Question

Assertion (A): Sequences of bases in one polynucleotide chain of DNA can determine the sequence of bases in the other chain.

Reason (R): There are three hydrogen bonds between A and T and two between C and G.

विकल्प

• Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.

• Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.

• Assertion (A) is true but reason (R) is false.

• Both assertion (A) and reason (R) are false.

Answer 1

Assertion (A) is true but reason (R) is false.

Explanation:

The assertion is true because complementary pairing determines the sequence of the opposite strand. The reason is false: A–T has two hydrogen bonds, while C–G has three.