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Assertion : Template or antisense strand...

Assertion : Template or antisense strand , having `3' rarr 5'` polarity takes part in transcription.
Reason : Non-template or sense strand, having `5' rarr3'` polarity, does not take part in transcription.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

if both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the assertion and reason provided in the question, we will break down the concepts of DNA strands, their roles in transcription, and the correctness of both statements. ### Step-by-Step Solution: 1. **Understanding DNA Strands**: - DNA consists of two strands: the template (antisense) strand and the non-template (sense) strand. - The template strand has a polarity of 3' to 5', while the non-template strand has a polarity of 5' to 3'. 2. **Role of the Template Strand in Transcription**: - During transcription, RNA polymerase synthesizes mRNA using the template strand. - The template strand is read in the 3' to 5' direction, allowing the mRNA to be synthesized in the 5' to 3' direction. 3. **Role of the Non-Template Strand**: - The non-template strand, also known as the sense strand, has the same sequence as the mRNA (except for the substitution of uracil for thymine). - However, it does not participate directly in the transcription process. 4. **Evaluating the Assertion**: - The assertion states that the template or antisense strand, having 3' to 5' polarity, takes part in transcription. This is correct because the template strand is indeed used by RNA polymerase to synthesize mRNA. 5. **Evaluating the Reason**: - The reason states that the non-template or sense strand, having 5' to 3' polarity, does not take part in transcription. This is also correct, as the non-template strand is not used for mRNA synthesis. 6. **Conclusion**: - Both the assertion and the reason are correct statements. However, the reason does not provide a correct explanation for the assertion because it simply states that the non-template strand does not participate in transcription, without addressing why the template strand is essential for this process. ### Final Answer: Both the assertion and reason are correct, but the reason is not a correct explanation of the assertion.
To analyze the assertion and reason provided in the question, we will break down the concepts of DNA strands, their roles in transcription, and the correctness of both statements. ### Step-by-Step Solution: 1. **Understanding DNA Strands**: - DNA consists of two strands: the template (antisense) strand and the non-template (sense) strand. - The template strand has a polarity of 3' to 5', while the non-template strand has a polarity of 5' to 3'. ...
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