Question 1

A frameshift is caused by ______ mutations.

Accepted Answer

A)  missense and insertion
B)  missense and nonsense
C)  nonsense and deletion
D)  deletion and insertion
E)  insertion and nonsenseF) B) and E)
G) A) and B)

Question 2

Each nucleotide is composed of

Accepted Answer

A)  one phosphate, one nitrogenous base, and one sugar.
B)  one phosphate, one nitrogenous base, and two sugars.
C)  two phosphates, one nitrogenous base, and one sugar.
D)  two phosphates, one nitrogenous base, and two sugars.
E)  one phosphate, two nitrogenous bases, and one sugar.F) D) and E)
G) A) and C)

Question 3

Which of the following is not associated with a bacterial ribosome?

Accepted Answer

A)  It is a 70s holoenzyme.
B)  It has a peptide (P)  site.
C)  It has an exit site.
D)  Its small subunit provides the enzymes for making peptide bonds.
E)  It has an amino acid (
A)   site.F) A) and E)
G) A) and D)

Question 4

The RNA molecules that carry amino acids to the ribosomes during protein synthesis are called ________.

Accepted Answer

A)  ribosomal RNA
B)  messenger RNA
C)  transfer RNA
D)  primer RNA
E)  ribozymesF) B) and D)
G) B) and C)

Question 5

The _____ is all of the genetic material of a cell.

Accepted Answer

A)  proteome
B)  chromosome
C)  genome
D)  plasmid
E)  prophageF) None of the above
G) A) and E)

Question 6

The jumping of a gene from one location to another is done by ________.

Accepted Answer

A)  conjugation
B)  transposons
C)  transformation
D)  transduction
E)  transmissionF) A) and B)
G) All of the above

Question 7

DNA Polymerase III

Accepted Answer

A)  synthesizes the primer.
B)  removes the primer.
C)  joins Okazaki fragments.
D)  unzips the DNA helix.
E)  proofreads new DNA.F) A) and B)
G) D) and E)

Question 8

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATE THE BAG RAT?

Accepted Answer

A)  Point
B)  Nonsense
C)  Insertion
D)  Deletion
E)  SilentF) C) and D)
G) A) and C)

Question 9

Lactose is a corepressor in the lac operon.

Accepted Answer

A) True 
 B)False

Question 10

The fields of genomics and proteomics differ in that

Accepted Answer

A)  the field of genomics involves the study of DNA replication and the field of proteomics refers to the study of transcription and translation.
B)  genomics refers to the study of an organism's entire genome, whereas proteomics is the study of expressed proteins.
C)  genomics is the study of an organism's chromosomes and the resulting proteins are studied in the field of proteomics.
D)  genomics is the study of an organism's chromosomes and proteomics is the study of transcription and translation of proteins.E) A) and B)
F) B) and C)

Question 11

All of the following pertain to transcription except

Accepted Answer

A)  it occurs on a ribosome in the cytoplasm.
B)  it occurs before translation.
C)  it requires RNA polymerase.
D)  it requires a template DNA strand.
E)  it is a process that contributes to the synthesis of protein.F) A) and E)
G) B) and D)

Question 12

Which is incorrect about inducible operons?

Accepted Answer

A)  They have genes turned off by a buildup of end product.
B)  They are often for use in catabolic pathways.
C)  They are normally turned off.
D)  They are turned on by the substrate of the enzyme.
E)  They include the lac operon.F) A) and B)
G) A) and C)

Question 13

DNA replication proceeds in one direction around the bacterial chromosome.

Accepted Answer

A) True 
 B)False

Question 14

Helicase ______.

Accepted Answer

A)  unwinds DNA
B)  supercoils DNA
C)  unwinds RNA
D)  winds RNAE) None of the above
F) C) and D)

Question 15

Which of the following additions have been made to principles of the central dogma of biology?

Accepted Answer

A)  DNA information cannot be converted into RNA information.
B)  Protein information can be converted into DNA information.
C)  RNA can be used to regulate gene function.
D)  DNA codes for proteins.E) A) and C)
F) A) and B)

Question 16

The three-base sequence on DNA that codes for an amino acid is called a/an ________.

Accepted Answer

A)  codon
B)  exon
C)  anticodon
D)  intron
E)  tripletF) B) and E)
G) A) and D)

Question 17

Which of the following is incorrect about termination codons?

Accepted Answer

A)  They are also called nonsense codons.
B)  They are the location where the bond between the final tRNA and the polypeptide is broken.
C)  They include AUG.
D)  They are UAA, UAG, and UGA.
E)  They do not have corresponding tRNA.F) D) and E)
G) A) and E)

Question 18

Groups of three consecutive bases along the DNA of a gene have the code for one _______.

Accepted Answer

A)  protein
B)  nucleotide
C)  amino acid
D)  purineE) A) and B)
F) C) and D)

Question 19

The nontranscribed region of DNA to which RNA polymerase binds to initiate transcription is called the ________.

Accepted Answer

A)  promoter
B)  operator
C)  operon
D)  exon
E)  intronF) All of the above
G) None of the above

Question 20

The operon segment composed of the gene that codes for a protein repressor is called the ________.

Accepted Answer

A)  operator
B)  structural locus
C)  regulator
D)  promoterE) A) and B)
F) B) and D)

Exam 9: Microbial Genetics

A frameshift is caused by ______ mutations.

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The _____ is all of the genetic material of a cell.

Correct AnswerverifiedShow Answer

The three-base sequence on DNA that codes for an amino acid is called a/an ________.

Correct AnswerverifiedShow Answer

The operon segment composed of the gene that codes for a protein repressor is called the ________.

Correct AnswerverifiedShow Answer

The RNA molecules that carry amino acids to the ribosomes during protein synthesis are called ________.

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DNA Polymerase III

Correct AnswerverifiedShow Answer

Which is incorrect about inducible operons?

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All of the following pertain to transcription except

Correct AnswerverifiedShow Answer

Groups of three consecutive bases along the DNA of a gene have the code for one _______.

Correct AnswerverifiedShow Answer

DNA replication proceeds in one direction around the bacterial chromosome.

Correct AnswerverifiedShow Answer

The jumping of a gene from one location to another is done by ________.

Correct AnswerverifiedShow Answer

The fields of genomics and proteomics differ in that

Correct AnswerverifiedShow Answer

The nontranscribed region of DNA to which RNA polymerase binds to initiate transcription is called the ________.

Correct AnswerverifiedShow Answer

Which of the following is not associated with a bacterial ribosome?

Correct AnswerverifiedShow Answer

Each nucleotide is composed of

Correct AnswerverifiedShow Answer

Lactose is a corepressor in the lac operon.

Correct AnswerverifiedShow Answer

Which of the following is incorrect about termination codons?

Correct AnswerverifiedShow Answer

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATE THE BAG RAT?

Correct AnswerverifiedShow Answer

Helicase ______.

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Which of the following additions have been made to principles of the central dogma of biology?

Correct AnswerverifiedShow Answer

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