Question 1

Processing of pre-tRNAs to produce tRNAs involves

Accepted Answer

A)   cleavage of the pre-tRNA.
B)   CCA addition to the 5ʹ end.
C)   phosphodiesterase activity to cleave the base and deoxyribose.
D)   the removal of one intron.E) All of the above
F) B) and C)

Question 2

Processing of tRNAs involves addition of a CCA 5′ terminus.

Accepted Answer

A) True 
 B)False

Question 3

Eukaryotic RNA polymerase III synthesizes _______.

Accepted Answer

The answer of Eukaryotic RNA polymerase III synthesizes _______....

Question 4

Which of the following RNAs is RNA polymerase II not responsible for transcribing?

Accepted Answer

A)   mRNA
B)   miRNA
C)   tRNA
D)   lncRNAE) A) and B)
F) None of the above

Question 5

All of the following are general transcription factors used in eukaryotic transcription except

Accepted Answer

A)   TFIIE
B)   TFIIH
C)   TBP
D)   BREE) A) and B)
F) A) and C)

Question 6

RNA splicing takes place in large complexes called _______.

Accepted Answer

The answer of RNA splicing takes place in large complexes...

Question 7

The $\sigma$subunit of E. coli RNA polymerase is necessary for transcriptional elongation.

Accepted Answer

A) True 
 B)False

Question 8

The RNA components of spliceosomes are five types of _______.

Accepted Answer

snRNAs (sm...

Question 9

Which statement about transcriptional termination in prokaryotes is false?

Accepted Answer

A)   Termination is signaled by transcription of a GC-rich interval.
B)   Transcription terminates when the RNA polymerase dissociates from its DNA template.
C)   The ribosome comes to a UAA, UAG, or UGA stop codon, and transcription ceases.
D)   A segment of RNA forms a stable stem-loop structure by complementary base pairing.E) A) and B)
F) B) and C)

Question 10

What important information was revealed by the discovery of catalytic RNAs?

Accepted Answer

Biologists had long puzzled over the nee...

Question 11

mRNAs are degraded in the cytoplasm by

Accepted Answer

A)   shortening of the poly-A tail and degradation from the 3′ end by nucleases.
B)   removal of the 5′ cap and degradation from the 5′ end by nucleases.
C)   Both a and b
D)   Neither a nor bE) B) and D)
F) B) and C)

Question 12

Suppose that a gene has three exons and two introns in the following order:
5ʹ exon 1 - intron 1 - exon 2 - intron 2 - exon 3 3ʹ
Which of the following could not result from alternative splicing in this gene?

Accepted Answer

A)   5ʹ exon 1 - exon 2 - exon 3 3ʹ
B)   5ʹ exon 2 - exon 3 3ʹ
C)   5ʹ exon 2 - exon 1 3ʹ
D)   5ʹ exon 1 - exon 3 3ʹE) B) and D)
F) B) and C)

Question 13

The large multi-subunit complex that links the general transcription factors to the gene-specific transcription factors is called

Accepted Answer

A)   the transcription complex.
B)   Mediator.
C)   the operator.
D)   TBP.E) All of the above
F) A) and D)

Question 14

Processing of RNA transcripts occurs

Accepted Answer

A)   only in eukaryotic cells.
B)   only with mRNA transcripts.
C)   only with rRNA and mRNA transcripts.
D)   with tRNA, rRNA, and mRNA transcripts.E) A) and B)
F) A) and C)

Question 15

Eukaryotic RNA polymerase I genes code for

Accepted Answer

A)   mRNAs.
B)   tRNAs.
C)   small nuclear RNAs and small cytoplasmic RNAs.
D)   ribosomal RNAs.E) None of the above
F) A) and B)

Question 16

Release of RNA polymerase II to initiate transcription appears to be the direct result of the

Accepted Answer

A)   binding of TAFs to the polymerase.
B)   unwinding of the DNA by helicases.
C)   phosphorylation of RNA polymerase by a protein kinase.
D)   removal of the nucleosome occupying the promoter site.E) B) and C)
F) None of the above

Question 17

The processing of pre-rRNA requires proteins and RNAs that are localized to the nucleolus.

Accepted Answer

A) True 
 B)False

Question 18

Explain why the lariat structure that is formed as an intermediate in RNA splicing could not be formed in a DNA molecule.

Accepted Answer

The first step of splicing is cleavage a...

Question 19

A process called alternative splicing of mRNA transcripts can produce mRNAs with _______ from the same gene.

Accepted Answer

A)   one different exon
B)   more or fewer exons
C)   completely different exons
D)   All of the aboveE) A) and D)
F) A) and C)

Question 20

The DNA sequence to which an RNA polymerase binds to initiate transcription of a gene is called a(n)

Accepted Answer

A)   enhancer.
B)   promoter.
C)   polymerase-binding element.
D)   origin of transcription.E) B) and D)
F) B) and C)

Exam 8: RNA Synthesis and Processing

Processing of pre-tRNAs to produce tRNAs involves

Correct AnswerverifiedShow Answer

A process called alternative splicing of mRNA transcripts can produce mRNAs with _______ from the same gene.

Correct AnswerverifiedShow Answer

The RNA components of spliceosomes are five types of _______.

Correct AnswerverifiedsnRNAs (sm...View AnswerShow Answer

Eukaryotic RNA polymerase I genes code for

Correct AnswerverifiedShow Answer

The large multi-subunit complex that links the general transcription factors to the gene-specific transcription factors is called

Correct AnswerverifiedShow Answer

Processing of tRNAs involves addition of a CCA 5′ terminus.

Correct AnswerverifiedShow Answer

mRNAs are degraded in the cytoplasm by

Correct AnswerverifiedShow Answer

All of the following are general transcription factors used in eukaryotic transcription except

Correct AnswerverifiedShow Answer

Eukaryotic RNA polymerase III synthesizes _______.

Correct AnswerverifiedShow Answer

Suppose that a gene has three exons and two introns in the following order: 5ʹ exon 1 - intron 1 - exon 2 - intron 2 - exon 3 3ʹ Which of the following could not result from alternative splicing in this gene?

Correct AnswerverifiedShow Answer

Which statement about transcriptional termination in prokaryotes is false?

Correct AnswerverifiedShow Answer

What important information was revealed by the discovery of catalytic RNAs?

Correct AnswerverifiedBiologists had long puzzled over the nee...View AnswerShow Answer

Release of RNA polymerase II to initiate transcription appears to be the direct result of the

Correct AnswerverifiedShow Answer

Processing of RNA transcripts occurs

Correct AnswerverifiedShow Answer

Explain why the lariat structure that is formed as an intermediate in RNA splicing could not be formed in a DNA molecule.

Correct AnswerverifiedThe first step of splicing is cleavage a...View AnswerShow Answer

RNA splicing takes place in large complexes called _______.

Correct AnswerverifiedShow Answer

The σ\sigmaσ subunit of E. coli RNA polymerase is necessary for transcriptional elongation.

Correct AnswerverifiedShow Answer

The processing of pre-rRNA requires proteins and RNAs that are localized to the nucleolus.

Correct AnswerverifiedShow Answer

Which of the following RNAs is RNA polymerase II not responsible for transcribing?

Correct AnswerverifiedShow Answer

The DNA sequence to which an RNA polymerase binds to initiate transcription of a gene is called a(n)

Correct AnswerverifiedShow Answer

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snRNAs (sm...
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Biologists had long puzzled over the nee...
View Answer

Correct Answer
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Correct Answer
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The first step of splicing is cleavage a...
View Answer

Correct Answer
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The $\sigma$ subunit of E. coli RNA polymerase is necessary for transcriptional elongation.

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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