Question 1

The most serious type of mutation is a

Accepted Answer

A)  Point mutation
B)  Silent mutation
C)  Frameshift mutation
D)  Back mutation
E)  All the choices are equally seriousF) C) and D)
G) B) and C)

Question 2

Lactose is a corepressor in the lac operon.

Accepted Answer

A) True 
 B)False

Question 3

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)  All of theseF) C) and D)
G) A) and E)

Question 4

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) None of the above
G) D) and E)

Question 5

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) None of the above
G) B) and C)

Question 6

A bacteriophage transfers DNA of the previous host to the current host.This is an example of

Accepted Answer

A)  Conjugation
B)  Generalized transduction
C)  Specialized transduction
D)  Creation of an Hfr cell
E)  None of the choices are correctF) C) and E)
G) A) and B)

Question 7

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 (stop) ?

Accepted Answer

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

Question 8

DNA photolyase, in the presence of visible light, can repair DNA damage due to ultraviolet radiation.

Accepted Answer

A) True 
 B)False

Question 9

Each _____ is a specific segment of the DNA with the code for production of one functional product.

Accepted Answer

A)  Intron
B)  Exon
C)  Gene
D)  Operator
E)  TripletF) A) and E)
G) A) and D)

Question 10

DNA Polymerase I

Accepted Answer

A)  Removes primers
B)  Adds bases to new DNA chain
C)  Seals DNA gaps
D)  Proofreads DNA chain
E)  All of the choices are correctF) A) and D)
G) B) and E)

Question 11

DNA polymerase can only add new nucleotides to the old 3' DNA end.

Accepted Answer

A) True 
 B)False

Question 12

The following pertain to ribosomes during protein synthesis except

Accepted Answer

A)  Contain codons within their rRNA molecules
B)  Participate only in translation
C)  Bind to the 5' end of mRNA by their small subunit
D)  Use their large subunit to supply enzymes for peptide bonding
E)  Shift toward the 3'end of the mRNA strand from one codon to the nextF) A) and B)
G) C) and E)

Question 13

A permanent, inheritable change in the genetic information is called a(n)

Accepted Answer

A)  Translation
B)  Transcription
C)  Mutation
D)  Alteration
E)  RegenerationF) A) and E)
G) A) and C)

Question 14

Which cell can transfer the most DNA?

Accepted Answer

A)  F+ cell
B)  F- cell
C)  Hfr cell
D)  R cell
E)  B cellF) A) and B)
G) D) and E)

Question 15

Repressible operons require that _____ bind to the repressor protein before it can bind to the operator.

Accepted Answer

A)  The product
B)  A cofactor
C)  A coenzyme
D)  The substrate
E)  The reactantF) A) and E)
G) A) and D)

Question 16

Helicase

Accepted Answer

A)  Unwinds DNA
B)  Supercoils DNA
C)  Unwinds RNA
D)  Winds RNA
E)  None of the choices are correctF) C) and E)
G) A) and C)

Question 17

Which of the following is not a type of bacterial DNA recombination?

Accepted Answer

A)  Transformation
B)  Conjugation
C)  Mitosis
D)  Transduction
E)  None of the aboveF) A) and C)
G) A) and B)

Question 18

Of the following list, which antibiotics affect protein synthesis?

Accepted Answer

A)  penicillin
B)  tetracycline
C)  chloramphenicol
D)  ciprofloxacin
E)  Both B and CF) B) and C)
G) A) and E)

Question 19

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)  Missense
B)  Nonsense
C)  Insertion
D)  Deletion
E)  SilentF) None of the above
G) A) and D)

Question 20

The lactose repressor

Accepted Answer

A)  Is transcribed with the structural lac genes
B)  Is activated by binding lactose
C)  Is inactivated by binding lactose
D)  Requires lactose for its transcription
E)  None of the choices are correctF) A) and D)
G) B) and E)

Exam 9: An Introduction to Microbial Genetics

Lactose is a corepressor in the lac operon.

Correct AnswerverifiedShow Answer

The lactose repressor

Correct AnswerverifiedShow Answer

DNA Polymerase I

Correct AnswerverifiedShow Answer

Helicase

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

A permanent, inheritable change in the genetic information is called a(n)

Correct AnswerverifiedShow Answer

DNA polymerase can only add new nucleotides to the old 3' DNA end.

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 (stop) ?

Correct AnswerverifiedShow Answer

Each _____ is a specific segment of the DNA with the code for production of one functional product.

Correct AnswerverifiedShow Answer

Which cell can transfer the most DNA?

Correct AnswerverifiedShow Answer

A frameshift is caused by ______ mutations?

Correct AnswerverifiedShow Answer

The following pertain to ribosomes during protein synthesis except

Correct AnswerverifiedShow Answer

Which of the following is not a type of bacterial DNA recombination?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The most serious type of mutation is a

Correct AnswerverifiedShow Answer

Of the following list, which antibiotics affect protein synthesis?

Correct AnswerverifiedShow Answer

A bacteriophage transfers DNA of the previous host to the current host.This is an example of

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

DNA photolyase, in the presence of visible light, can repair DNA damage due to ultraviolet radiation.

Correct AnswerverifiedShow Answer

Repressible operons require that _____ bind to the repressor protein before it can bind to the operator.

Correct AnswerverifiedShow Answer

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