Question 1

Of the following list, which antibiotics affect protein synthesis?

Accepted Answer

A)   penicillin
B)   tetracycline
C)   chloramphenicol
D)   ciprofloxacin
E)   Both tetracycline and chloramphenicol are correct.F) B) and D)
G) A) and E)

Question 2

Which of the following is incorrect about transfer RNA?

Accepted Answer

A)   has a bottom hairpin loop with an anticodon
B)   An anticodon is complementary to a codon.
C)   contains a binding site for an amino acid
D)   The initiator tRNA that binds to the P site has the anticodon UAC.
E)   Initiator tRNA in bacteria carries tryptophan.F) A) and E)
G) A) and B)

Question 3

Among the microorganisms, various genomes can include

Accepted Answer

A)   chromosomes.
B)   plids.
C)   mitochondrial DNA.
D)   chloroplast DNA.
E)   All of these choices are correct.F) All of the above
G) A) and B)

Question 4

All of the following pertain to nitrogenous bases except

Accepted Answer

A)   they form pairs by hydrogen bonding.
B)   guanine pairs with uracil.
C)   adenine pairs with thymine.
D)   cytosine and thymine are pyrimidines.
E)   they allow variation from one nucleotide to another which creates the encoded information.F) A) and E)
G) All of the above

Question 5

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) C) and D)
F) B) and D)

Question 6

Which is incorrect about purines?

Accepted Answer

A)   Purines are only found in DNA, not in RNA.
B)   Purines are nitrogenous bases.
C)   Purines are always paired with a specific pyrimidine.
D)   Purines include adenine and guanine.
E)   Purines are found within nucleotides.F) A) and E)
G) All of the above

Question 7

The process in which mutations are removed and replaced with the correct bases is called

Accepted Answer

A)   transduction.
B)   excision repair.
C)   frameshift.
D)   back mutation.
E)   transformation.F) A) and E)
G) All of the above

Question 8

The development of virulent, toxin-producing bacterial strains due to the presence of a temperate phage can occur in

Accepted Answer

A)   bacterial conjugation.
B)   transformation.
C)   generalized transduction.
D)   specialized transduction.
E)   All of these choices are correct.F) A) and B)
G) D) and E)

Question 9

Structural genes code for

Accepted Answer

A)   ribosomal RNA molecules.
B)   transfer RNA molecules.
C)   cellular proteins.
D)   gene expression elements.
E)   All of these choices are correct.F) A) and B)
G) None of the above

Question 10

DNA polymerase III

Accepted Answer

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

Question 11

Okazaki fragments are attached to the growing end of the lagging strand by

Accepted Answer

A)   DNA ligase.
B)   DNA polymerase.
C)   DNA helicase.
D)   DNA gyrase.
E)   primase.F) C) and D)
G) B) and D)

Question 12

The duplication of a cell's DNA is called

Accepted Answer

A)   mitosis.
B)   replication.
C)   transcription.
D)   translation.
E)   mutation.F) A) and D)
G) A) and E)

Question 13

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATA ETH EBI GRA T?

Accepted Answer

A)   missense
B)   nonsense
C)   insertion
D)   deletion
E)   silentF) None of the above
G) D) and E)

Question 14

Bacterial conjugation involves

Accepted Answer

A)   bacteriophage carrying donor DNA to the recipient cell.
B)   a donor cell that transfers a copy of a plid to a recipient cell through a pilus.
C)   the take-up of naked DNA fragments from a lysed donor cell by a recipient cell.
D)   new progeny cells with genes from two parent bacterial cells.E) A) and B)
F) None of the above

Question 15

A screening system called the _____ test is used for detecting chemicals with carcinogenic potential.

Accepted Answer

A)   Koch
B)   Ames
C)   mutation
D)   cancer
E)   IowaF) A) and B)
G) A) and C)

Question 16

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

Accepted Answer

A)   chromosome
B)   plid
C)   prophage
D)   genome
E)   proteomeF) D) and E)
G) A) and C)

Question 17

Helicase

Accepted Answer

A)   unwinds DNA.
B)   supercoils DNA.
C)   unwinds RNA.
D)   winds RNA.E) A) and B)
F) B) and C)

Question 18

DNA gyrase

Accepted Answer

A)   unwinds DNA.
B)   supercoils DNA.
C)   cleaves DNA.
D)   joins free DNA ends.E) A) and C)
F) A) and B)

Question 19

Induced mutations result from errors in DNA replication.

Accepted Answer

A) True 
 B)False

Question 20

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) A) and E)
G) A) and C)

Exam 9: Microbial Genetics

Which is incorrect about purines?

Correct AnswerverifiedShow Answer

Helicase

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Okazaki fragments are attached to the growing end of the lagging strand by

Correct AnswerverifiedShow Answer

Of the following list, which antibiotics affect protein synthesis?

Correct AnswerverifiedShow Answer

The duplication of a cell's DNA is called

Correct AnswerverifiedShow Answer

Which of the following is incorrect about transfer RNA?

Correct AnswerverifiedShow Answer

The process in which mutations are removed and replaced with the correct bases is called

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 ATA ETH EBI GRA T?

Correct AnswerverifiedShow Answer

Among the microorganisms, various genomes can include

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

DNA gyrase

Correct AnswerverifiedShow Answer

A screening system called the _____ test is used for detecting chemicals with carcinogenic potential.

Correct AnswerverifiedShow Answer

Structural genes code for

Correct AnswerverifiedShow Answer

All of the following pertain to nitrogenous bases except

Correct AnswerverifiedShow Answer

Induced mutations result from errors in DNA replication.

Correct AnswerverifiedShow Answer

Bacterial conjugation involves

Correct AnswerverifiedShow Answer

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

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

DNA polymerase III

Correct AnswerverifiedShow Answer

The development of virulent, toxin-producing bacterial strains due to the presence of a temperate phage can occur in

Correct AnswerverifiedShow Answer

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