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Biology
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29 Nov 2019

Many eukaryotic genes have regions called enhances. What is an enhancer?

a. RNA polymerase binds here to begin transcription. b. a DNA sequence close to the promoter where a specific protein can bing to activate translationc. c. DNA seqeuence far from the promotoer where a specific protein can bind to activate transcription. d. ribosomes bind here to begin translation e. snRNP's bind here

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Reid WolffLv2
17 Dec 2019
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Related questions

Which of the following statements are true?

a. All eukaryotic genes contain enhancers, one or more proximal elements, and a core promoter with TATA box.

b. TFIID is required for RNA polymerase to bind at proximal elements.

c. Enhancers can be located upstream or downstream of genes or even within introns.

d. General transcription factors are required for RNA polymerase to bind at enhancer regions.

e. two of the above statements are true

1) In Eukaryotes, repetitive sequence inclues:
A) Centromere sequences
B) Telomere sequences
C) All of the above

2) Satelit DNA:
A) Was orignally discoverd in E. Coli
B) Represents plasmid DNA sequences
C) Contains repetitive DNA sequences
D) Has the same density as main band DNA
E) All of the above

3) Inversions _____ The number of crossover offspring.
A) Decrease
B) Increase
C) Do not change
(I Believe the answer is "C" ^. can you explain why?)

4) In human genome, repetitive DNA is estimated to be ___ of the total genome.
A) .1%
B) 1%
C) 10%
D) 50%
E) 90%

5) In E. Coli, the promoter sequence:
A) Contains a short AT rich sequence
B) Binds transcription factors
C) All of the above

6) In eukaryotic transcription:
A) Transcription factors bind to the promoter and then RNA polymerase binds.
B) Transcription factors bind to RNA polymerase which then binds to the promoter
C) Transcription factors are NOT required to initiate transcription

Explanation for each would help immensely. THANK YOU in advance for your time!!!

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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