Question 1

Exons

Accepted Answer

A)   are translated.
B)   are found in most prokaryotic genes.
C)   are removed during RNA processing.
D)   provide RNA stability.
E)   are added after transcription.F) All of the above
G) B) and E)

Question 2

In a nucleic acid hybridization experiment performed to detect exons, an appropriate probe would be

Accepted Answer

A)   single-stranded DNA.
B)   double-stranded DNA.
C)   triple-stranded DNA.
D)   single-stranded RNA.
E)   double-stranded RNA.F) A) and C)
G) A) and E)

Question 3

Refer to the figure.  What is the location of the amino acid attachment site of this tRNA molecule?

Accepted Answer

The answer of Refer to the figure.  What is...

Question 4

Which type of molecule transfers information from the nucleus to the cytoplasm in the eukaryotic cell?

Accepted Answer

A)   DNA
B)   mRNA
C)   tRNA
D)   Protein
E)   LipidF) B) and E)
G) All of the above

Question 5

Inclusion-cell (I-cell)  disease is a failure of

Accepted Answer

A)   proteolysis.
B)   glycosylation.
C)   phosphorylation.
D)   the fidelity function.
E)   translation.F) C) and D)
G) C) and E)

Question 6

Transcription is the process of

Accepted Answer

A)   synthesizing a DNA molecule from an RNA template.
B)   assembling ribonucleoside triphosphates into an RNA molecule without a template.
C)   synthesizing an RNA molecule using a DNA template.
D)   synthesizing a protein using information from a messenger RNA.
E)   replicating a single-stranded DNA molecule.F) A) and D)
G) A) and E)

Question 7

What are the first five amino acids that would be translated from the following mRNA molecule?
5ʹ-...ACGAUACGUAUGCUCGAGAUCCGAGACUAUGUU...-3ʹ

Accepted Answer

Methionine (from AUG...

Question 8

Refer to the figure, which shows the genetic code.  Which amino acid does CGG code for?

Accepted Answer

The answer of Refer to the figure, which shows the...

Question 9

If there were five kinds of nucleotides, a genetic code (with codons that are three nucleotides long) would have _______ different types of codons.

Accepted Answer

The answer of If there were five kinds of nucleotides,...

Question 10

Order the four steps shown as they would occur, from beginning to end, during expression of a eukaryotic gene. (1)  Pre-mRNA is processed to make mRNA.
(2)  Ribosomes translate the mRNA message to make proteins.
(3)  mRNA is transported to the cytoplasm.
(4)  DNA is used as a template to make pre-mRNA.

Accepted Answer

A)   1, 4, 3, 2
B)   4, 3, 1, 2
C)   4, 1, 3, 2
D)   4, 1, 2, 3
E)   1, 2, 4, 3F) B) and E)
G) B) and D)

Question 11

If the following synthetic RNA were added to a test tube containing all the components necessary for protein translation to occur, what would the amino acid sequence be? 5-AUAUAUAUAUAU-3

Accepted Answer

A)   Polyphenylalanine
B)   Isoleucine-tyrosine-isoleucine-tyrosine
C)   Isoleucine-isoleucine-isoleucine-isoleucine
D)   Tyrosine-tyrosine-tyrosine-tyrosine
E)   Asparagine-asparagine-asparagine-asparagineF) B) and E)
G) None of the above

Question 12

In bacteria, proteins called _______ factors assist transcription by directing the polymerase onto the promoter.

Accepted Answer

The answer of In bacteria, proteins called _______ factors assist...

Question 13

Suppose the DNA of a gene contains seven regions, A through G, in that order.Regions A, B, E, and G are located in exons, while regions C, D, and F are located in introns.What is the order of the regions in the mature mRNA transcribed from that sequence?

Accepted Answer

A)   AB
B)   ABEG
C)   ABEGCDF
D)   CDF
E)   ABCDEFGF) A) and D)
G) A) and E)

Question 14

If codons were read two bases at a time instead of three bases at a time, how many different possible amino acids could be specified?

Accepted Answer

A)   16
B)   64
C)   8
D)   32
E)   128F) All of the above
G) D) and E)

Question 15

What would happen if a mutation occurred in DNA such that the second codon of the resulting mRNA was changed from UGG to UAG?

Accepted Answer

A)   Translation would continue and the second amino acid would be the same.
B)   Nothing; the ribosome would skip that codon, and translation would continue.
C)   Translation would continue, but the reading frame of the ribosome would be shifted.
D)   Translation would stop at the second codon, and no functional protein would be made.
E)   Translation would continue, but the second amino acid in the protein would be different.F) A) and E)
G) A) and C)

Question 16

Consensus sequences involved in splicing are located

Accepted Answer

A)   at the centers of introns.
B)   at the centers of exons.
C)   on introns bordering each splice site.
D)   at 5 caps.
E)   at poly A tails.F) D) and E)
G) A) and C)

Question 17

The gene for the reverse transcriptase enzyme, which is used to reverse transcribe viral RNA into DNA in infected cells, is found in the

Accepted Answer

A)   host cell genome.
B)   bacterial plasmid genome.
C)   mitochondrial genome.
D)   genome of retroviruses.
E)   genome of DNA viruses.F) B) and E)
G) None of the above

Question 18

mRNA is synthesized in the _______ direction, which corresponds to the _______ of the protein.

Accepted Answer

A)   5ʹ-to-3ʹ; N terminus to C terminus
B)   3ʹ-to-5ʹ; C terminus to N terminus
C)   5ʹ-to-3ʹ; C terminus to N terminus
D)   3ʹ-to-5ʹ; N terminus to C terminus
E)   Examples of all of the above have been found.F) None of the above
G) A) and E)

Question 19

Given that a 5-to-3 strand of DNA is ATGTCGCATAC, what is the template DNA strand that would be used for transcription?

Accepted Answer

A)   5-AUGUCGCAUAC-3
B)   5-UACAGCGUAUG-3
C)   3-UACAGCGUAUG-5
D)   3-TACAGCGTATG-5
E)   5-TACAGCGTATG-3F) A) and B)
G) A) and E)

Question 20

Which statement about codons and anticodons is true?

Accepted Answer

A)   The codon bonds covalently with the anticodon.
B)   They have the same base sequences.
C)   There are 64 codons and 61 anticodons.
D)   Activating enzymes link codons and anticodons.
E)   At contact, the codon and the anticodon are antiparallel to each other.F) A) and E)
G) All of the above

Exam 14: From Dna to Protein: Gene Expression

Transcription is the process of

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Suppose the DNA of a gene contains seven regions, A through G, in that order.Regions A, B, E, and G are located in exons, while regions C, D, and F are located in introns.What is the order of the regions in the mature mRNA transcribed from that sequence?

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In a nucleic acid hybridization experiment performed to detect exons, an appropriate probe would be

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If there were five kinds of nucleotides, a genetic code (with codons that are three nucleotides long) would have _______ different types of codons.

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Consensus sequences involved in splicing are located

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Given that a 5-to-3 strand of DNA is ATGTCGCATAC, what is the template DNA strand that would be used for transcription?

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mRNA is synthesized in the _______ direction, which corresponds to the _______ of the protein.

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Order the four steps shown as they would occur, from beginning to end, during expression of a eukaryotic gene. (1) Pre-mRNA is processed to make mRNA. (2) Ribosomes translate the mRNA message to make proteins. (3) mRNA is transported to the cytoplasm. (4) DNA is used as a template to make pre-mRNA.

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Exons

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What are the first five amino acids that would be translated from the following mRNA molecule? 5ʹ-...ACGAUACGUAUGCUCGAGAUCCGAGACUAUGUU...-3ʹ

Correct AnswerverifiedMethionine (from AUG...View AnswerShow Answer

Which type of molecule transfers information from the nucleus to the cytoplasm in the eukaryotic cell?

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In bacteria, proteins called _______ factors assist transcription by directing the polymerase onto the promoter.

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Which statement about codons and anticodons is true?

Correct AnswerverifiedShow Answer

Inclusion-cell (I-cell) disease is a failure of

Correct AnswerverifiedShow Answer

If the following synthetic RNA were added to a test tube containing all the components necessary for protein translation to occur, what would the amino acid sequence be? 5-AUAUAUAUAUAU-3

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The gene for the reverse transcriptase enzyme, which is used to reverse transcribe viral RNA into DNA in infected cells, is found in the

Correct AnswerverifiedShow Answer

If codons were read two bases at a time instead of three bases at a time, how many different possible amino acids could be specified?

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Refer to the figure. What is the location of the amino acid attachment site of this tRNA molecule?

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Refer to the figure, which shows the genetic code. Which amino acid does CGG code for?

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What would happen if a mutation occurred in DNA such that the second codon of the resulting mRNA was changed from UGG to UAG?

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mRNA is synthesized in the _ direction, which corresponds to the _ of the protein.

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Methionine (from AUG...
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