Question 1

________ enables a single gene to encode two or more polypeptides that are different in their amino acid sequence.

Accepted Answer

A)   Reverse transcription
B)   Self-splicing
C)   Capping
D)   Alternative splicing
E)   Regulatory splicing D

Question 2

Which sequence of events is most CORRECT for the initiation and elongation steps of translation?
(1)  initiator tRNA binds start codon on mRNA
(2)  small ribosomal subunit binds to mRNA
(3)  large ribosomal subunit binds
(4)  tRNA entry and peptidyl transfer reaction
(5)  translocation of ribosome and release of tRNA

Accepted Answer

A)   1,2,3,4,5
B)   1,2,3,5,4
C)   1,3,2,4,5
D)   2,3,1,5,4
E)   2,1,3,4,5

Question 3

Which of the following statements 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. Blooms Level: Remembe

Question 4

Which of the following would be true of a strain that can grow in minimal medium containing ornithine, citrulline, or arginine, but not in minimal medium alone? Bread mold can grow in a minimal medium without supplements (wild type)  while certain mutated strains (mutants)  can only grow in a minimal medium that is supplemented with specific intermediates found in the following metabolic pathway for arginine synthesis:
 minimal ------> ornithine -------> citrulline ------> arginine, where enzyme 1 converts the precursor to ornithine, enzyme 2 converts ornithine to citrulline, and enzyme 3 converts citrulline to arginine.

Accepted Answer

A)   The strain would have a mutation in the gene that encodes enzyme 1.
B)   The strain would have a mutation in the gene that encodes enzyme 2.
C)   The strain would have a mutation in the gene that encodes enzyme 3.
D)   The strain would have a mutation in the gene that encodes for enzymes 1, 2, and 3.
E)   The strain would be the wild type with no genetic mutations.

Question 5

A(n)  ______ is an organized unit of DNA sequences that enables a segment of DNA to be transcribed into RNA and ultimately results in the formation of a functional product.

Accepted Answer

A)   chromosome
B)   trait
C)   allele
D)   gene
E)   expression

Question 6

DNA is used as a template to make mRNA, which contains the information to make a polypeptide.

Accepted Answer

A) True 
 B)False  True

Question 7

________ is to transcription as ________ are to translation?

Accepted Answer

A)   RNA splicesome; ribosomes
B)   RNA polymerase; ribosomes
C)   RNA polymerase; RNA splicesomes
D)   DNA polymerase; RNA polymerase
E)   DNA polymerase; ribosomes B

Question 8

A strain that can grow in a minimal medium containing arginine, but NOT in a minimal medium containing citrulline or ornithine would have a mutation in the gene that encodes for Bread mold can grow in a minimal medium without supplements (wild type)  while certain mutated strains (mutants)  can only grow in a minimal medium that is supplemented with specific intermediates found in the following metabolic pathway for arginine synthesis:
 minimal ------> ornithine -------> citrulline ------> arginine, where enzyme 1 converts the precursor to ornithine, enzyme 2 converts ornithine to citrulline, and enzyme 3 converts citrulline to arginine.

Accepted Answer

A)   enzyme 1.
B)   enzyme 2.
C)   enzyme 3.
D)   both enzymes 1 and 3.
E)   both enzymes 2 and 3.

Question 9

If a DNA template strand has a sequence of 3? TACAATGTAGCC 5?, then the RNA produced from it will be which sequence?

Accepted Answer

A)   3?TACAATGTAGCC5?
B)   5?ATGTTACATCGG3?
C)   5?AUGUUACAUCGG3'
D)   3?AUGUUACAUCGG5?
E)   3?ATGTTACATCGG5?

Question 10

Which of the following molecule(s)  exhibits self-splicing?

Accepted Answer

A)   rRNA
B)   tRNA
C)   mRNA
D)   rRNA and tRNA
E)   rRNA and mRNA

Question 11

If an mRNA sequence is 5?AUG-GGC-ACU-CAU3?, what would the anticodon sequence be?

Accepted Answer

A)   3?AUG-GGC-ACU-CAU5?
B)   3?UAC-CCG-UGA-GUA5?
C)   5?AUG-GGC-ACU-CAU3?
D)   5?UAC-CCG-UGA-GUA3?
E)   3?TAC-CCG-TGA-GTA3?

Exam 12: Gene Expression at the Molecular Level

________ enables a single gene to encode two or more polypeptides that are different in their amino acid sequence.

Correct Answer
verified
D

Correct Answer
verified

Which of the following statements about the 5?cap and mRNA processing is TRUE?

Correct Answer
verified

Correct Answer
verified

A(n) ______ is an organized unit of DNA sequences that enables a segment of DNA to be transcribed into RNA and ultimately results in the formation of a functional product.

Correct Answer
verified

DNA is used as a template to make mRNA, which contains the information to make a polypeptide.

Correct Answer
verified
True

is to transcription as are to translation?

Correct Answer
verified
B

Correct Answer
verified

If a DNA template strand has a sequence of 3? TACAATGTAGCC 5?, then the RNA produced from it will be which sequence?

Correct Answer
verified

Which of the following molecule(s) exhibits self-splicing?

Correct Answer
verified

If an mRNA sequence is 5?AUG-GGC-ACU-CAU3?, what would the anticodon sequence be?

Correct Answer
verified

Exam 12: Gene Expression at the Molecular Level

________ enables a single gene to encode two or more polypeptides that are different in their amino acid sequence.

Correct AnswerverifiedD

Correct AnswerverifiedShow Answer

Which of the following statements about the 5?cap and mRNA processing is TRUE?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A(n) ______ is an organized unit of DNA sequences that enables a segment of DNA to be transcribed into RNA and ultimately results in the formation of a functional product.

Correct AnswerverifiedShow Answer

DNA is used as a template to make mRNA, which contains the information to make a polypeptide.

Correct AnswerverifiedTrue

________ is to transcription as ________ are to translation?

Correct AnswerverifiedB

Correct AnswerverifiedShow Answer

If a DNA template strand has a sequence of 3? TACAATGTAGCC 5?, then the RNA produced from it will be which sequence?

Correct AnswerverifiedShow Answer

Which of the following molecule(s) exhibits self-splicing?

Correct AnswerverifiedShow Answer

If an mRNA sequence is 5?AUG-GGC-ACU-CAU3?, what would the anticodon sequence be?

Correct AnswerverifiedShow Answer

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
True

is to transcription as are to translation?

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified