Question 1

Because more than one codon can specify the same amino acid,the genetic code is said to be

Accepted Answer

A)  repetitive.
B)  redundant.
C)  reverse.
D)  degenerate.
E)  wobbly.F) A) and E)
G) B) and D)

Question 2

As part of the transcriptional unit,regulatory sequences are the sites where RNA polymerase and transcription factors bind to regulate transcription.

Accepted Answer

A) True 
 B)False

Question 3

What is NOT a component of the translation machinery?

Accepted Answer

A)  mRNA
B)  tRNA
C)  translation factors
D)  ribosomes
E)  protein polymeraseF) B) and E)
G) None of the above

Question 4

Which amino acid would Nirenberg and Leder have found when they used the triplet UAG?

Accepted Answer

A)  Isoleucine
B)  Proline
C)  Lysine
D)  Threonine
E)  None of theseF) A) and D)
G) None of the above

Question 5

Analyze each statement and decide which are CORRECT.

Accepted Answer

A)  RNA polymerase simultaneously transcribes both strands of DNA
B)  It is possible for one RNA polymerase to transcribe one strand of DNA in the 5' to 3' direction and another RNA polymerase to transcribe the complimentary strand of DNA in the 3' to 5' direction,producing two identical transcripts
C)  It is possible for one RNA polymerase to transcribe one strand of DNA in the 5' to 3' direction and another RNA polymerase to transcribe the complimentary strand of DNA in the 5' to 3' direction,producing two identical transcripts
D)  It is possible for one RNA polymerase to transcribe one strand of DNA in the 5' to 3' direction and another RNA polymerase to transcribe the complimentary strand of DNA in the 3' to 5' direction,producing two different transcripts
E)  It is possible for one RNA polymerase to transcribe one strand of DNA in the 5' to 3' direction and another RNA polymerase to transcribe the complimentary strand of DNA in the 5' to 3' direction,producing two different transcriptsF) A) and E)
G) A) and B)

Question 6

The cells of every organism make only a few different tRNA molecules encoded by the same gene.

Accepted Answer

A) True 
 B)False

Question 7

What factors are recognized by the cell in order to recognize the stop codon and disassemble the translation machinery?

Accepted Answer

A)  elongation factors
B)  release factors
C)  transcription factors
D)  initiation factors
E)  mRNA factorsF) C) and D)
G) D) and E)

Question 8

If Nirenberg and Leder had the technology,what would be a better substitute to using radiolabeled amino acids?

Accepted Answer

A)  Radiolabeled proteins
B)  Radiolabeled tRNAs
C)  Ribosomes acids labeled with a fluorescent dye
D)  Amino acids labeled with a fluorescent dye
E)  All of these statements are correctF) B) and E)
G) A) and E)

Question 9

The molecule mRNA,which contains the information to make a polypeptide,is constructed from a DNA template.

Accepted Answer

A) True 
 B)False

Question 10

If a cell's splicesomes were mutated so they no longer functioned normally,what consequences would result?

Accepted Answer

A)  Introns would remain in the mature mRNA.
B)  Exons would be missing in the mature mRNA.
C)  Transcription would cease.
D)  A functional protein would still be produceD.
E)  RNA processing would remain intact.F) None of the above
G) D) and E)

Question 11

Which statement about the 5'cap and mRNA processing is TRUE?

Accepted Answer

A)  The addition of a 5' cap to mRNA occurs while the pre-mRNA is being made.
B)  The 5' cap helps stabilize the mature mRNA.
C)  The 5' cap prevents the degradation of mature mRNA.
D)  The 5' cap is added to the pre-mRNA by splicesomes.
E)  The 5'cap is a group of adenosine molecules.F) A) and C)
G) A) and D)

Question 12

What molecule indirectly provides the energy for translation?

Accepted Answer

A)  ADP
B)  ATP
C)  GMP
D)  GDP
E)  GTPF) C) and D)
G) A) and C)

Question 13

What is the function of the poly A tail?

Accepted Answer

A)  The poly A tail is required for the termination of translation,it is recognized by the release factor proteins
B)  The poly A tail is required for the mRNA to resume its double helical structure
C)  The poly A tail increases mRNA stability in eukaryotes
D)  The poly A tail increases mRNA stability in prokaryotes
E)  The poly A tail serves as a termination sequence for RNA polymerase IIIF) C) and E)
G) All of the above

Question 14

The term N-terminus refers to the presence of this at one of the ends of a polypeptide.

Accepted Answer

A)  oxygen atom
B)  carboxyl group
C)  amino group
D)  carbonyl group
E)  sulfate groupF) C) and D)
G) None of the above

Exam 10: Gene Expression at the Molecular Level

What is NOT a component of the translation machinery?

Correct Answer
verified

Which statement about the 5'cap and mRNA processing is TRUE?

Correct Answer
verified

Because more than one codon can specify the same amino acid,the genetic code is said to be

Correct Answer
verified

What is the function of the poly A tail?

Correct Answer
verified

If Nirenberg and Leder had the technology,what would be a better substitute to using radiolabeled amino acids?

Correct Answer
verified

What molecule indirectly provides the energy for translation?

Correct Answer
verified

The term N-terminus refers to the presence of this at one of the ends of a polypeptide.

Correct Answer
verified

What factors are recognized by the cell in order to recognize the stop codon and disassemble the translation machinery?

Correct Answer
verified

If a cell's splicesomes were mutated so they no longer functioned normally,what consequences would result?

Correct Answer
verified

Which amino acid would Nirenberg and Leder have found when they used the triplet UAG?

Correct Answer
verified

Analyze each statement and decide which are CORRECT.

Correct Answer
verified

The molecule mRNA,which contains the information to make a polypeptide,is constructed from a DNA template.

Correct Answer
verified

The cells of every organism make only a few different tRNA molecules encoded by the same gene.

Correct Answer
verified

As part of the transcriptional unit,regulatory sequences are the sites where RNA polymerase and transcription factors bind to regulate transcription.

Correct Answer
verified

Exam 10: Gene Expression at the Molecular Level

What is NOT a component of the translation machinery?

Correct AnswerverifiedShow Answer

Which statement about the 5'cap and mRNA processing is TRUE?

Correct AnswerverifiedShow Answer

Because more than one codon can specify the same amino acid,the genetic code is said to be

Correct AnswerverifiedShow Answer

What is the function of the poly A tail?

Correct AnswerverifiedShow Answer

If Nirenberg and Leder had the technology,what would be a better substitute to using radiolabeled amino acids?

Correct AnswerverifiedShow Answer

What molecule indirectly provides the energy for translation?

Correct AnswerverifiedShow Answer

The term N-terminus refers to the presence of this at one of the ends of a polypeptide.

Correct AnswerverifiedShow Answer

What factors are recognized by the cell in order to recognize the stop codon and disassemble the translation machinery?

Correct AnswerverifiedShow Answer

If a cell's splicesomes were mutated so they no longer functioned normally,what consequences would result?

Correct AnswerverifiedShow Answer

Which amino acid would Nirenberg and Leder have found when they used the triplet UAG?

Correct AnswerverifiedShow Answer

Analyze each statement and decide which are CORRECT.

Correct AnswerverifiedShow Answer

The molecule mRNA,which contains the information to make a polypeptide,is constructed from a DNA template.

Correct AnswerverifiedShow Answer

The cells of every organism make only a few different tRNA molecules encoded by the same gene.

Correct AnswerverifiedShow Answer

As part of the transcriptional unit,regulatory sequences are the sites where RNA polymerase and transcription factors bind to regulate transcription.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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