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Ligase

In a transcri...

Question

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?

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Solution

It's the interaction of the sigma unit with the accessory proteinsp

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Q. Assertion :The predominant site for control of gene expression in prokaryotes is transcription initiation. Reason: The activity of RNA polymerase is regulated by accessory proteins, which affect recognition of start sites.

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

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?

Q. In eukaryotic transcription
(A) RNA polymerase II is responsible for the transcription of hnRNA
(B) The transcription factors recognise the promoter
(C) The core promoter determines the frequency of initiation
(D) Transcription termination by genes transcribed by RNA polymerase I are similar to rho-dependent prokaryotic termination

Choose the correct option

Q. Read the statements regarding the lac operon and choose the correct option
I. An inducer regulates the switching on and off of lac operon.
II.Repressor protein dissociates from operator region and prevents RNA polymerase from transcribing the operon.
III. In the presence of lactose, the repressor is activated by interaction with lactose.
IV. RNA polymerase has access to the promoter and transcription proceeds only when the repressor is inactivated.

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