Gene Expression: Transcription

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Question 1
Free
Short Answer

Please select the best match for each term.
A)Encodes the amino acid sequence of a polypeptide
B)With ribosomal proteins,makes up the ribosomes
C)Forms the initiation complex with RNA polymerase in eukaryotes
D)Forms complexes that are used in eukaryotic RNA processing
E)Brings amino acids to ribosomes during translation
-1)mRNA
2)tRNA
3)rRNA
4)snRNA
5)GTF

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Question 2
Free
Multiple Choice

In eukaryotes,the initiation complex binds DNA at the

Choose correct answer/s
A

Pribnow box.

B

GC box.

C

CAAT box.

D

TATA box.

E

GTF region.

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Question 3
Free
Multiple Choice

The process by which genetic information is transferred from DNA to RNA is called

Choose correct answer/s
A

replication.

B

transcription.

C

translation.

D

transversion.

E

transformation.

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Question 4
Free
Multiple Choice

Which of the following proteins is found only in the RNA polymerase holoenzyme?

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A

Alpha

B

Beta

C

Epsilon

D

Sigma

E

Rho

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Question 5
Free
Multiple Choice

During the initiation step of transcription,which molecule binds the promoter region of a DNA molecule?

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A

DNA polymerase

B

Reverse transcriptase

C

RNA polymerase

D

DNA primase

E

Topoisomerase

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Question 6
Multiple Choice

During transcription,the synthesis of the mRNA strand proceeds in which direction?

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A
5' to 3' only
B
3' to 5' only
C
Both 5' to 3' and 3' to 5'
D
Either 5' to 3' or 3' to 5'
E
First 5' to 3',and then 3' to 5'
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Question 7
Multiple Choice

Which type of RNA is found only in eukaryotes?

Choose correct answer/s
A
mRNA
B
tRNA
C
rRNA
D
snRNA
E
All of these
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Question 8
Multiple Choice

Which of the following catalyzes the synthesis of ribosomal RNA in eukaryotes?

Choose correct answer/s
A
RNA polymerase I
B
RNA polymerase II
C
RNA polymerase III
D
Both RNA polymerase I and II
E
Both RNA polymerase I and III
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Question 9
Multiple Choice

Prokaryotic transcription begins when RNA polymerase binds to which site of the gene region?

Choose correct answer/s
A
-35
B
-10
C
+1
D
+10
E
+35
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Question 10
Multiple Choice

Sequences that contain information about the stability of a transcript are found in the

Choose correct answer/s
A
5' UTR.
B
coding sequence.
C
3' UTR.
D
leading strand.
E
lagging strand.
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Question 11
Multiple Choice

Which of the following is not found in a eukaryotic promoter?

Choose correct answer/s
A
-10 box
B
TATA box
C
GC box
D
CAAT box
E
None of these
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Question 12
Multiple Choice

In eukaryotes,where does transcription take place?

Choose correct answer/s
A
In the cytoplasm
B
Anywhere in the cell
C
In the nucleus
D
In both the cytoplasm and nucleus
E
In the mitochondria
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Question 13
Multiple Choice

In eukaryotes,precursor mRNA molecules are processed in the

Choose correct answer/s
A
ribosomes.
B
nucleus.
C
mitochondria.
D
cytoplasm.
E
nucleolus.
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Question 14
Multiple Choice

The single strand of mRNA that is produced during transcription has the same polarity as the ________ strand of DNA.

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A
template
B
nontemplate
C
leading
D
lagging
E
nonsense
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Question 15
Multiple Choice

The poly(A)tail of an mRNA

Choose correct answer/s
A
helps transport the pre-mRNA to the cytoplasm.
B
keeps the coding sequences from being degraded.
C
is added without an RNA template.
D
is important in initiation of translation.
E
is removed from an mRNA after its maturation.
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Question 16
Multiple Choice

Self-cleaving RNAs that function catalytically are called

Choose correct answer/s
A
snRNPs.
B
snRNAs.
C
ribozymes.
D
ribosomes.
E
spliceosomes.
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Question 17
Multiple Choice

Molecules of tRNA are

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A
75 to 90 nucleotides in length.
B
single-stranded with secondary structure.
C
cloverleaf in shape.
D
synthesized with modified bases.
E
All of these
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Question 18
Multiple Choice

A prokaryotic mRNA transcript is

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A
transcribed completely before being translated.
B
further processed before it is transcribed.
C
transported from the nucleus before it is translated.
D
modified before it is translated.
E
translated as it is being transcribed.
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Question 19
Multiple Choice

Which parts of a eukaryotic gene are transcribed?

Choose correct answer/s
A
Only the exons
B
Only the introns
C
Both the exons and introns
D
Exons,introns,promoter,and terminator sequence
E
It depends on the gene
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Question 20
Multiple Choice

Posttranscriptional insertion or deletion of nucleotides that is absent in the DNA template is called

Choose correct answer/s
A
RNA splicing.
B
RNA editing.
C
RNA processing.
D
RNA capping.
E
RNA modification.
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