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

A, B, and C

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A, B, and D

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B, C, and D

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A, C, and D

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Solution

The correct option is B A, B, and D
Transcription in eukaryotes is initiated with the help of transcription factors responsible for recognising the promoter, to which the RNA polymerase binds, which determines the transcription start point. The sequence elements upstream of the core promoter influence the frequency of initiation.

In eukaryotes, transcription termination is different for different RNA polymerases. RNA polymerase I transcription termination is similar to rho-dependant termination in prokaryotes. The ribosomal rRNA genes transcribed by RNA Polymerase I contain a specific sequence of base pairs that is recognized by a termination protein called TTF-1. This is similar to the rho-dependent termination in prokaryotes.

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Similar questions

The paragraph below gives a description about transcription. Which is the correct description among them? (a) Enzyme involved in transcription is RNA polymerase-II, which consists of 5 polypeptides α, β, β’, σ and ω. Core enzyme recognizes promoter site while σ factor takes part in chain elongation. (b). Initiation starts with help of core enzymes of RNA polymerase enzyme. (c) Elongation is done by σ factor, which moves along the sense strand. (d) In prokaryotes, termination is done by rho factor while in eukaryotes; poly A tail is responsible for termination at 3’.

Q. Identify the correct sequence of events occurring in eukaryotic transcription,
(A) Binding of RNA polymerase
(B) Phosphorylation of C-terminus domain
(C) Transcription initiation
(D) Binding of transcription factors

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. The transcription initiation factor associated with the RNA polymerase holoenzyme in prokaryotes is

Q. Which of the following comparisons of prokaryotic transcription and eukaryotic transcription is incorrect?

	Prokaryotic transcription	Eukaryotic transcription
(a)	Transcriptional unit has only one gene	Transcriptional unit has one or more genes
(b)	Occurs in the cytoplasm	Occurs in the nucleus
(c)	A single RNA polymerase synthesises all the three types of RNA	The RNA polymerase I, II and III synthesise rRNA, mRNA and tRNA respectively
(d)	Coupled-transcription translation is the rule	Coupled transcription translation is notpossible

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