Question 1

Toxigenicity in Corynebacterium diphtheriae is due to phage conversion.

Accepted Answer

A) True 
 B)False

Question 2

A typical mutation rate for a bacterium is in the range of 10⁻⁶ to 10⁻⁹ per kbp.

Accepted Answer

A) True 
 B)False

Question 3

The enzyme transposase may be coded for by insertion sequences on a

Accepted Answer

A)  chromosome.
B)  phage.
C)  plasmid.
D)  chromosome,phage,or plasmid.E) B) and C)
F) A) and B)

Question 4

How might mutations in the  sequence,whose enzyme is involved in DNA proofreading,be beneficial for a microbe in a highly competitive and dynamic community?

Accepted Answer

Mutations in <img  loading="lazy" src="/assets/images/blured-textbook.svg" class="d-inline m-1" alt="blured image" width="139" height="30"> would result in an increas...

Question 5

The use of transposons to generate mutations is a convenient way to create bacterial mutations in the laboratory.

Accepted Answer

A) True 
 B)False

Question 6

The designations Phe⁻,Leu⁻,and Ser⁺ refer to an organism's

Accepted Answer

A)  plasmid type.
B)  genotype.
C)  phenotype.
D)  mutation type.E) B) and D)
F) B) and C)

Question 7

Compare and contrast generalized transduction with specialized transduction.

Accepted Answer

Transduction as a whole is the transfer ...

Question 8

You have performed the following mating experiment using Hfr and F⁻ strains of Escherichia coli:
 Hfr (thr⁺ leu⁺ gal⁺ strˢ) × F⁻ (thr⁻ leu⁻ gal⁻ strʳ) .Which of the following selective media would you use to score recombinant colonies?

Accepted Answer

A)  minimal medium
B)  minimal medium + streptomycin
C)  minimal medium + threonine
D)  minimal medium + streptomycin + threonineE) None of the above
F) All of the above

Question 9

A mutant you made in the laboratory with 5-bromouracil suddenly regains the wild-type phenotype.You discuss this phenomenon with your advisor and colleagues,and they suggest you try transposon mutagenesis to avoid this problem and create stable mutants.Why would mutants created with 5-bromouracil be more likely to regain the wild-type phenotype than mutants created via transposon mutagenesis?

Accepted Answer

Because a point mutation involves only a...

Question 10

Which of the following features are common to transformation,transduction,and conjugation? (1) unidirectional transfer of genes
(2) incomplete gene transfer
(3) homologous recombination
(4) meiosis occurring in the recipient

Accepted Answer

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

Question 11

Which of the following methods may introduce foreign DNA into a recipient?

Accepted Answer

A)  transformation
B)  transduction
C)  conjugation
D)  transformation,transduction,and conjugationE) A) and B)
F) B) and D)

Question 12

Which process listed below does NOT require homologous recombination to maintain the new genetic material in the recipient cell?

Accepted Answer

A)  conjugation of an F+ plasmid
B)  gene transfer through a genetic transfer agent
C)  transduction by a dsDNA phage Mu
D)  transformation of a linear piece of DNAE) A) and B)
F) None of the above

Question 13

Homologous recombination has been observed in

Accepted Answer

A)  Archaea.
B)  Bacteria.
C)  Eukarya.
D)  Archaea,Bacteria,and Eukarya.E) C) and D)
F) B) and D)

Question 14

Lysogeny is essential for the virulence of many pathogenic bacterial strains.

Accepted Answer

A) True 
 B)False

Question 15

Plasmids that govern their own transfer are known as

Accepted Answer

A)  transformable.
B)  transmutable.
C)  conjugative.
D)  transfective.E) B) and C)
F) None of the above

Question 16

Consider the following experiment.First,large populations of two mutant strains of Escherichia coli are mixed,each requiring a different,single amino acid.After plating them onto a minimal medium,45 colonies grew.Which of the following may explain this result?

Accepted Answer

A)  The colonies may be due to back mutation (reversion) .
B)  The colonies may be due to recombination.
C)  Either A or B is possible.
D)  Neither A nor B is possible.E) B) and C)
F) A) and C)

Question 17

If a bacterium carrying a plasmid that confers resistance to ampicillin is placed into medium without ampicillin,it may

Accepted Answer

A)  gain resistance to other antibiotics.
B)  transfer resistance to other cultures in the laboratory.
C)  undergo a reversion mutation.
D)  lose the plasmid because there is no selection for ampicillin resistance.E) C) and D)
F) None of the above

Question 18

The positions of genes on a genetic map are marked according to

Accepted Answer

A)  degrees.
B)  nanometers.
C)  radians.
D)  minutes.E) A) and B)
F) All of the above

Question 19

The evolutionary significance of phage conversion likely stems from an effective alteration of host cells.

Accepted Answer

A) True 
 B)False

Question 20

When UV radiation damage occurs,DNA repair occurs only in the absence of template instruction.

Accepted Answer

A) True 
 B)False

Exam 10: Genetics of Bacteria and Archaea

Plasmids that govern their own transfer are known as

Correct Answer
verified

Correct Answer
verified
Because a point mutation involves only a...
View Answer

The designations Phe⁻,Leu⁻,and Ser⁺ refer to an organism's

Correct Answer
verified

If a bacterium carrying a plasmid that confers resistance to ampicillin is placed into medium without ampicillin,it may

Correct Answer
verified

Lysogeny is essential for the virulence of many pathogenic bacterial strains.

Correct Answer
verified

Toxigenicity in Corynebacterium diphtheriae is due to phage conversion.

Correct Answer
verified

Compare and contrast generalized transduction with specialized transduction.

Correct Answer
verified
Transduction as a whole is the transfer ...
View Answer

You have performed the following mating experiment using Hfr and F⁻ strains of Escherichia coli: Hfr (thr⁺ leu⁺ gal⁺ strˢ) × F⁻ (thr⁻ leu⁻ gal⁻ strʳ) .Which of the following selective media would you use to score recombinant colonies?

Correct Answer
verified

Which of the following methods may introduce foreign DNA into a recipient?

Correct Answer
verified

Which process listed below does NOT require homologous recombination to maintain the new genetic material in the recipient cell?

Correct Answer
verified

Consider the following experiment.First,large populations of two mutant strains of Escherichia coli are mixed,each requiring a different,single amino acid.After plating them onto a minimal medium,45 colonies grew.Which of the following may explain this result?

Correct Answer
verified

Which of the following features are common to transformation,transduction,and conjugation? (1) unidirectional transfer of genes (2) incomplete gene transfer (3) homologous recombination (4) meiosis occurring in the recipient

Correct Answer
verified

The evolutionary significance of phage conversion likely stems from an effective alteration of host cells.

Correct Answer
verified

The use of transposons to generate mutations is a convenient way to create bacterial mutations in the laboratory.

Correct Answer
verified

Homologous recombination has been observed in

Correct Answer
verified

The positions of genes on a genetic map are marked according to

Correct Answer
verified

How might mutations in the sequence,whose enzyme is involved in DNA proofreading,be beneficial for a microbe in a highly competitive and dynamic community?

Correct Answer
verified
Mutations in would result in an increas...
View Answer

When UV radiation damage occurs,DNA repair occurs only in the absence of template instruction.

Correct Answer
verified

A typical mutation rate for a bacterium is in the range of 10⁻⁶ to 10⁻⁹ per kbp.

Correct Answer
verified

The enzyme transposase may be coded for by insertion sequences on a

Correct Answer
verified

Exam 10: Genetics of Bacteria and Archaea

Plasmids that govern their own transfer are known as

Correct AnswerverifiedShow Answer

Correct AnswerverifiedBecause a point mutation involves only a...View AnswerShow Answer

The designations Phe⁻,Leu⁻,and Ser⁺ refer to an organism's

Correct AnswerverifiedShow Answer

If a bacterium carrying a plasmid that confers resistance to ampicillin is placed into medium without ampicillin,it may

Correct AnswerverifiedShow Answer

Lysogeny is essential for the virulence of many pathogenic bacterial strains.

Correct AnswerverifiedShow Answer

Toxigenicity in Corynebacterium diphtheriae is due to phage conversion.

Correct AnswerverifiedShow Answer

Compare and contrast generalized transduction with specialized transduction.

Correct AnswerverifiedTransduction as a whole is the transfer ...View AnswerShow Answer

You have performed the following mating experiment using Hfr and F⁻ strains of Escherichia coli: Hfr (thr⁺ leu⁺ gal⁺ strˢ) × F⁻ (thr⁻ leu⁻ gal⁻ strʳ) .Which of the following selective media would you use to score recombinant colonies?

Correct AnswerverifiedShow Answer

Which of the following methods may introduce foreign DNA into a recipient?

Correct AnswerverifiedShow Answer

Which process listed below does NOT require homologous recombination to maintain the new genetic material in the recipient cell?

Correct AnswerverifiedShow Answer

Consider the following experiment.First,large populations of two mutant strains of Escherichia coli are mixed,each requiring a different,single amino acid.After plating them onto a minimal medium,45 colonies grew.Which of the following may explain this result?

Correct AnswerverifiedShow Answer

Which of the following features are common to transformation,transduction,and conjugation? (1) unidirectional transfer of genes (2) incomplete gene transfer (3) homologous recombination (4) meiosis occurring in the recipient

Correct AnswerverifiedShow Answer

The evolutionary significance of phage conversion likely stems from an effective alteration of host cells.

Correct AnswerverifiedShow Answer

The use of transposons to generate mutations is a convenient way to create bacterial mutations in the laboratory.

Correct AnswerverifiedShow Answer

Homologous recombination has been observed in

Correct AnswerverifiedShow Answer

The positions of genes on a genetic map are marked according to

Correct AnswerverifiedShow Answer

How might mutations in the sequence,whose enzyme is involved in DNA proofreading,be beneficial for a microbe in a highly competitive and dynamic community?

Correct AnswerverifiedMutations in would result in an increas...View AnswerShow Answer

When UV radiation damage occurs,DNA repair occurs only in the absence of template instruction.

Correct AnswerverifiedShow Answer

A typical mutation rate for a bacterium is in the range of 10⁻⁶ to 10⁻⁹ per kbp.

Correct AnswerverifiedShow Answer

The enzyme transposase may be coded for by insertion sequences on a

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
Because a point mutation involves only a...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Transduction as a whole is the transfer ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Mutations in would result in an increas...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified