Assertion: The principal site for control of gene expression in prokaryotes is the point from where transcription starts.
Reason: Recognition of start sites is regulated by accessory proteins which directly control the activity of RNA polymerase

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
In prokaryotes, transcriptional initiation is the important site for the control of gene expression. RNA polymerase identifies the start point of transcription by interacting with the accessory proteins which affect its ability to recognise start sites. These regulatory proteins can act both positively as activators and negatively as repressors.

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Similar questions

In a transcription unit the activity of RNA polymerase at a given promoter is in turn regulated by whose interaction with accessory proteins? which affect its ability to recognise start sites?

Q. In prokaryotes, holoenzyme RNA polymerase attaches to the DNA sequence at the promoter site of template DNA during transcription. The sequence of that point where the RNA polymerase binds is:

Q. In prokaryotes, the predominant site for control of gene expression is

Q. Which of the following statement(s) is/are correct?
Statement 1: In prokaryotes, gene expression is generally regulated at the site of transcriptional initiation.
Statement 2 : In eukaryotes regulation of gene expression occurs at multiple levels

Q. Regulatory proteins are the accessory proteins that interact with RNA polymerase and affect its role in transcription. Which of the following statements is correct about regulatory protein?

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Assertion: The principal site for control of gene expression in prokaryotes is the point from where transcription starts. Reason: Recognition of start sites is regulated by accessory proteins which directly control the activity of RNA polymerase

Assertion: The principal site for control of gene expression in prokaryotes is the point from where transcription starts.
Reason: Recognition of start sites is regulated by accessory proteins which directly control the activity of RNA polymerase