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28 Sep 2018

Chromatin remodeling proteins control gene expression by changing the accessibility of _______________.

Select one:

a. histone acetyl-transferases to nonacetylated histones

b. sequence-specific transcription factors to TATA boxes.

c. general transcription factors to TBP

d. none of these answers

e. sequence-specific transcription factors to their binding sites in promoters and enhancers

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Related questions

A. True or false. Support your answer

a. RNA differs from DNA in that is single-stranded and cannot base pair.

b. The fetal β-globins arose from a gene duplication that occurred 200 million years ago, which gave rise to a different forms of b-gobins expressed in the fetus and in the adult.

c. A total genomic library will be larger than a cDNA library for a given cell.

d. Histone acetyltransferases affect transcription by both altering chromatin structure to allow accessibility to the DNA and by adding acetyl groups to histones that can bind proteins that promote transcription.

e. The proteins in neurons and white blood cells are completely different.

f. Maternally –coded transcription factors determine segmentation in Drosophila melanogaster larvae.

In Eukaryotic transcription, what is the difference between an enhancer, a mediator, a coactivator and a trascriptional activator protein? In your answer, for each one include (a) if it's the term refers to a DNA sequence or a protein, and if it's a protein (b) if it interacts with DNA, with another protein, or with both. Also how are enhancers different from promoters in affecting gene transcription in eukaryotes? Make sure that you include in your discussion: (c) their relative position to the transcription initiation site; (d) the role of binding sites for proteins; (e) how each affects initiation and transcriptional regulation (in the latter, make a distinction between the core and the regulatory promoter

1 DNA sequences found in introns provide [A] amino acid sequence information.

[B] regulatory information.
[C] no known useful information.

[D] structure for the gene.
[E] alternative DNA splicing possibilities.

3. The TATA box is a(n)
[A] sequence close to the promoter region of many genes.
[B] square-shaped sequence.
[C] enhancer consensus sequence.
[D] activator sequence necessary for proper translation.
[E] None of the above

5. Regarding genes and gene expression, which of the following is not a difference between prokaryotes and eukaryotes
[A] Eukaryotic DNA does not contain a TATA box close to the initiation site as does prokaryotic DNA.

[B] In eukaryotes, RNA polymerase requires

'transcription factors'or initiation.

[C] Prokaryotic genes are often grouped together in

operons.

[D] In eukaryotes, the regulation of several genes at once requires common control elements in each of the genes.
[E] There is a diversity of eukaryotic polymerases that is reflected in the diversity of eukaryotic promoters.

10) In eukaryotic cells, a repressor

[A] is made of DNA.
[B] binds to the enhancer region to block transcription. [

C] is located both upstream and downstream from the promoter.
[D] binds to the operator to block RNA polymerase.

[E] binds to a silencer to reduce transcription rates.

Coordinated regulation of genes in eukaryotic cells [A] is the result of positioning the same regulatory sequence in front of each gene.
[B] results from all of those genes being under the control of one promoter.

[C] occurs because related genes all have the same

operons.
[D] occurs because enhancers cause DNA to bend.

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