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A : RNAi takes place in all eukaryotic o...

A : RNAi takes place in all eukaryotic organisms as a method of cellular defense.
R : Complementary dsRNA molecule binds to specific mRNA and prevents its translation (silencing).

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1 )

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

C

If Assertion is true statement but Reason is false, then mark (3).

D

If both Assertion and Reason are false statements, then mark (4).

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the given statements regarding RNA interference (RNAi), we will break down the assertion (A) and the reason (R) step by step. ### Step-by-Step Solution: 1. **Understanding the Assertion (A)**: - The assertion states that "RNAi takes place in all eukaryotic organisms as a method of cellular defense." - RNA interference (RNAi) is indeed a biological process that occurs in eukaryotic cells. It serves as a defense mechanism against viruses and transposable elements by regulating gene expression. 2. **Evaluating the Reason (R)**: - The reason states that "Complementary dsRNA molecule binds to specific mRNA and prevents its translation (silencing)." - This statement is accurate. RNAi involves the action of double-stranded RNA (dsRNA) that is complementary to a target mRNA. When this dsRNA binds to the mRNA, it prevents the mRNA from being translated into protein, effectively silencing the gene. 3. **Linking Assertion and Reason**: - The assertion and reason are linked because the mechanism described in the reason (binding of complementary dsRNA to mRNA) is a fundamental part of how RNAi functions as a cellular defense mechanism in eukaryotes. 4. **Conclusion**: - Both the assertion (A) and the reason (R) are true, and the reason provides a correct explanation for the assertion. RNAi is a method of cellular defense in eukaryotes, and it operates through the mechanism of dsRNA binding to mRNA to silence gene expression. ### Final Answer: - Both the assertion (A) and the reason (R) are true, and the reason correctly explains the assertion. ---
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