Question

Assertion (A): RNAi (RNA interference) occurs in all eukaryotic organisms as a method of cellular defence.

Reason (R): This method involves silencing of a specific mRNA due to a complementary dsRNA that binds to specific mRNA and prevents translation of the mRNA.

Options

• 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

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

Explanation:

RNAi is a cellular defence mechanism found in eukaryotes, and complementary dsRNA can silence a specific mRNA. However, the reason describes how RNAi works; it does not explain why RNAi occurs in all eukaryotes.