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Assertion (A): Termination codons or sto...

Assertion (A): Termination codons or stop codons are UAA, UAG and UGA.
Reason (R): Stop codons represent termination of translation.

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
To solve the question regarding the assertion and reason about stop codons, we will break it down step by step. ### Step 1: Understanding the Assertion The assertion states that "Termination codons or stop codons are UAA, UAG, and UGA." - **Explanation**: In molecular biology, codons are sequences of three nucleotides that correspond to specific amino acids or signal the termination of protein synthesis. UAA, UAG, and UGA are indeed recognized as stop codons in the genetic code. ### Step 2: Understanding the Reason The reason states that "Stop codons represent termination of translation." - **Explanation**: Translation is the process by which ribosomes synthesize proteins using mRNA as a template. Stop codons signal the end of this process. When a ribosome encounters a stop codon, it releases the newly synthesized polypeptide chain, thereby terminating translation. ### Step 3: Evaluating the Truth of Both Statements - Both the assertion and the reason are true. The assertion correctly identifies the stop codons, and the reason accurately describes their function in the translation process. ### Step 4: Analyzing the Relationship Between Assertion and Reason - The reason provides a correct explanation for the assertion. The presence of stop codons is essential for the proper termination of translation, preventing the synthesis of defective proteins. ### Conclusion Both the assertion (A) and the reason (R) are true, and the reason is the correct explanation of the assertion. Therefore, the answer is: - **Option 1**: Both assertion A and reason R are true, and reason R is the correct explanation of assertion A. ---
To solve the question regarding the assertion and reason about stop codons, we will break it down step by step. ### Step 1: Understanding the Assertion The assertion states that "Termination codons or stop codons are UAA, UAG, and UGA." - **Explanation**: In molecular biology, codons are sequences of three nucleotides that correspond to specific amino acids or signal the termination of protein synthesis. UAA, UAG, and UGA are indeed recognized as stop codons in the genetic code. ### Step 2: Understanding the Reason The reason states that "Stop codons represent termination of translation." ...
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