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Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
Assertion: Core enzyme catalyses chain elongation of RNA.
Reason : The presence of sigma factor is required for initiation of transcription.
- a)Both assertion and reason are true and reason is the correct explanation of assertion.
- b)Both assertion and reason are true but reason is not the correct explanation of assertion.
- c)Assertion is true but reason is false.
- d)Both assertion and reason are false.
Correct answer is option 'B'. Can you explain this answer?
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Directions: Two statements are given-one labelled Assertion and the o...
The “core enzyme which catalyses covalent chain extension, consists of two a. - polypeptides (each of molecular weight about 41,000), one (3 - polypeptide ( molecular weight about 155,000) , one polypeptide (molecular weight about 165,000) and one co-polypeptide (molecular weight about 12,000). The “holoenzyme” contains in addition, a -polypeptide (molecular weight about 95,000). The presence of the sigma factor is required for initiation at the proper transcription initiation (or promoter) sites. After each RNA chain - initiation event, sigma is released and the core enzyme catalyses chain elongation.
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Directions: Two statements are given-one labelled Assertion and the o...
Assertion: Core enzyme catalyses chain elongation of RNA.
Reason: The presence of sigma factor is required for initiation of transcription.
The correct answer to this question is option 'B' - Both assertion and reason are true but the reason is not the correct explanation of the assertion.
Explanation:
Transcription Process:
Transcription is the process by which RNA is synthesized from a DNA template. It involves the synthesis of RNA molecules using one strand of the DNA molecule as a template. The enzyme responsible for transcription is called RNA polymerase.
Core Enzyme:
The RNA polymerase holoenzyme consists of a core enzyme and a sigma factor. The core enzyme is responsible for the elongation of the RNA chain during transcription. It has the ability to catalyze the synthesis of RNA by adding nucleotides to the growing RNA chain.
Sigma Factor:
The sigma factor is a protein subunit that is required for the initiation of transcription. It recognizes specific DNA sequences called promoter regions and helps in the binding of RNA polymerase to the DNA strand. It plays a crucial role in guiding the RNA polymerase to the correct position on the DNA template for transcription initiation.
Assertion and Reason:
The assertion states that the core enzyme catalyses chain elongation of RNA. This is true as the core enzyme is responsible for the synthesis of RNA by adding nucleotides to the growing RNA chain. It carries out the process of chain elongation during transcription.
The reason states that the presence of a sigma factor is required for the initiation of transcription. This is also true as the sigma factor recognizes the promoter regions on the DNA template and helps in the binding of RNA polymerase to initiate transcription.
Correct Explanation:
While both the assertion and reason are true, the reason does not provide a correct explanation for the assertion. The reason talks about the requirement of a sigma factor for the initiation of transcription, which is a separate step in the transcription process. The core enzyme, on the other hand, is responsible for the elongation of the RNA chain during transcription. Both the steps are important in the overall process of transcription, but the reason does not directly explain the assertion.
Therefore, the correct answer is option 'B' - Both assertion and reason are true but the reason is not the correct explanation of the assertion.
Reason: The presence of sigma factor is required for initiation of transcription.
The correct answer to this question is option 'B' - Both assertion and reason are true but the reason is not the correct explanation of the assertion.
Explanation:
Transcription Process:
Transcription is the process by which RNA is synthesized from a DNA template. It involves the synthesis of RNA molecules using one strand of the DNA molecule as a template. The enzyme responsible for transcription is called RNA polymerase.
Core Enzyme:
The RNA polymerase holoenzyme consists of a core enzyme and a sigma factor. The core enzyme is responsible for the elongation of the RNA chain during transcription. It has the ability to catalyze the synthesis of RNA by adding nucleotides to the growing RNA chain.
Sigma Factor:
The sigma factor is a protein subunit that is required for the initiation of transcription. It recognizes specific DNA sequences called promoter regions and helps in the binding of RNA polymerase to the DNA strand. It plays a crucial role in guiding the RNA polymerase to the correct position on the DNA template for transcription initiation.
Assertion and Reason:
The assertion states that the core enzyme catalyses chain elongation of RNA. This is true as the core enzyme is responsible for the synthesis of RNA by adding nucleotides to the growing RNA chain. It carries out the process of chain elongation during transcription.
The reason states that the presence of a sigma factor is required for the initiation of transcription. This is also true as the sigma factor recognizes the promoter regions on the DNA template and helps in the binding of RNA polymerase to initiate transcription.
Correct Explanation:
While both the assertion and reason are true, the reason does not provide a correct explanation for the assertion. The reason talks about the requirement of a sigma factor for the initiation of transcription, which is a separate step in the transcription process. The core enzyme, on the other hand, is responsible for the elongation of the RNA chain during transcription. Both the steps are important in the overall process of transcription, but the reason does not directly explain the assertion.
Therefore, the correct answer is option 'B' - Both assertion and reason are true but the reason is not the correct explanation of the assertion.
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Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: Core enzyme catalyses chain elongation of RNA.Reason : The presence of sigma factor is required for initiation of transcription.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer?
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Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: Core enzyme catalyses chain elongation of RNA.Reason : The presence of sigma factor is required for initiation of transcription.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: Core enzyme catalyses chain elongation of RNA.Reason : The presence of sigma factor is required for initiation of transcription.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: Core enzyme catalyses chain elongation of RNA.Reason : The presence of sigma factor is required for initiation of transcription.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer?.
Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: Core enzyme catalyses chain elongation of RNA.Reason : The presence of sigma factor is required for initiation of transcription.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: Core enzyme catalyses chain elongation of RNA.Reason : The presence of sigma factor is required for initiation of transcription.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: Core enzyme catalyses chain elongation of RNA.Reason : The presence of sigma factor is required for initiation of transcription.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: Core enzyme catalyses chain elongation of RNA.Reason : The presence of sigma factor is required for initiation of transcription.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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ample number of questions to practice Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: Core enzyme catalyses chain elongation of RNA.Reason : The presence of sigma factor is required for initiation of transcription.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice NEET tests.
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