Question

Given below are two statements marked Assertion and Reason.
Assertion: RNAi technique is applied to plants and animals to protect them from pest infestation.
Reason: This technique inhibits the expression of certain genes in pests.

• A. Both Assertion and Reason are true and Reason is the correct explanation for Assertion.
• B. Both Assertion and Reason are true but Reason is not the correct explanation for Assertion.
• C. Assertion is true and Reason is false.
• D. Both Assertion and Reason are false.

Hint:

RNAi = Gene Silencing. Always look for this link in Biotech questions.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
RNA interference (RNAi) is a gene silencing mechanism.

Step 2: Detailed Explanation:
Assertion: RNAi is used in biotechnology to develop pest-resistant plants (e.g., against Meloidogyne incognita). It is a cellular defense mechanism.
Reason: The mechanism works by binding a complementary dsRNA to a specific mRNA, preventing its translation (silencing it). In pests, this inhibits genes vital for their survival.
Since the Reason explains "how" the protection in the Assertion works, it is the correct explanation.

Step 3: Final Answer:
Both are true and Reason explains Assertion. Option (a).