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Biology
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11 Dec 2019

An enhancer is?

a DNA element that stimulates transcription of eukaryotic promoters

binds to RNA polymerase and stimulates transcription

acts as a binding site for RNA polymerase

interacts with repressor proteins to enhance transcriptional repression.

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Lelia Lubowitz
Lelia LubowitzLv2
13 Dec 2019
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Related questions

The promoter is an important sequence for transcription of a gene. Which of these components binds to the promoter of a eukaryotic gene to allow transcription to begin? Select all that are correct.

A. Ribosomal subunits
B. A start codon
C. DNA polymerase enzyme
D. General transcription factors
E. RNA polymerase enzyme

Eukaryotic transcription normally takes place on a chromatin template at nuclease-accessible sites.(True/False)

*After promoter clearance by RNA polymerase II:

A) all associated factors remain bound to the polymerase for elongation.

B) a subset of factors remain at the promoter region.

*Which of the following statements is FALSE?

A) RNA polymerase II is responsible for the transcription of genes encoding protein-coding sequences only.

B) Many promoters recognized by RNA polymerase II contain regulatory elements several kbp upstream of the initiation site.

C) TFIIB has a role in converting a closed-promoter into an open-promoter complex.

D) The C-terminal domain of the largest subunit of RNA pol II undergoes extensive phosphorylation prior to transcription elongation.

E) A multiprotein complex is involved in communication between upstream control elements and proteins bound at the promoter.

C) no further elongation factors are acquired by the polymerase.

D) no further chromatin remodeling is required.

E) transcription continues until the polymerase reaches the poly (A) tail

*In eukaryotes RNA polymerase I transcribes all of the ribosomal RNA components.(TRUE/FALSE)

The transcription factor TFIIIA is a protein that

stimulates gene transcription and

is

known to bind zinc ions. Some reports suggest that TFIIIA binds similarly to DNA and RNA in

a sequence

-

specific manner. D

o you see any potential problem

with that conclusion?

Explain.

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