Question 1

Prokaryotic cells are diploid.

Accepted Answer

A) True 
 B)False

Question 2

You observe a microbiologist examining two plates and notice the pattern of colonies are nearly identical with the exception of a few colonies that are absent on one of them.The plates likely were produced by

Accepted Answer

A)   positive selection culturing.
B)   replica plating.
C)   pour plating.
D)   streak plating.
E)   the Ames test.

Question 3

The Ames test demonstrates that a chemical is

Accepted Answer

A)   carcinogenic.
B)   carcinogenic in Salmonella.
C)   mutagenic in Salmonella.
D)   carcinogenic in humans.
E)   mutagenic in humans.

Question 4

RNA polymerase is primarily responsible for

Accepted Answer

A)   DNA replication.
B)   translation.
C)   transcription.
D)   transformation.
E)   polyadenylation.

Question 5

Most bacteria have a natural ability to take up DNA from their environment.

Accepted Answer

A) True 
 B)False

Question 6

DNA damage caused by nitrous acid results in ________ mutations.

Accepted Answer

A)   insertion
B)   substitution
C)   deletion
D)   frameshift
E)   both insertion and deletion

Question 7

Except during initiation of translation,transfer RNA molecules carrying amino acids initially bind to the ribosome at the (P/A/E)site.

Accepted Answer

The answer of Except during initiation of translation,transfer RNA molecules...

Question 8

Which of the following is involved in translation?

Accepted Answer

A)   rRNA only
B)   tRNA only
C)   mRNA only
D)   both mRNA and tRNA
E)   mRNA, rRNA, and tRNA are all involved.

Question 9

During elongation,a charged tRNA first enters the ribosomal ________ site and then moves into the ________ site.

Accepted Answer

A)   A; E
B)   P; A
C)   P; E
D)   A; P
E)   E; A

Question 10

Which of the following is characteristic of prokaryotic genomes but not eukaryotic genomes?

Accepted Answer

A)   histones
B)   circular chromosomes
C)   linear chromosomes
D)   enclosed in a nuclear membrane
E)   typically consist of a few to several chromosomes

Question 11

Which of the following is NOT a characteristic of both DNA and RNA polymerases?

Accepted Answer

A)   directionality of synthesis
B)   energy is provided by pyrophosphate
C)   hydrogen bonding of complementary nucleotides
D)   requirement for an initiation signal
E)   requirement for a primer

Question 12

Prokaryotic operons typically include a(n) ________ and a(n) ________ with multiple genes.

Accepted Answer

A)   operator; terminator
B)   operator; promoter
C)   promoter; repressor
D)   inducer; repressor
E)   CAP-binding site; inducer

Question 13

A protein has altered function as a result of a single amino acid substitution in the polypeptide.This change resulted from a (missense/nonsense/silent)mutation.

Accepted Answer

The answer of A protein has altered function as a...

Question 14

A polypeptide in a wild type microbe contains the sequence Leu-Pro-Tyr-Ser-Pro.A phenotypic variant of the species has the peptide sequence Leu-Pro-Cys-Ser-Pro.This is an example of a(n) ________ mutation.

Accepted Answer

A)   nonsense
B)   missense
C)   silent
D)   frameshift
E)   inversion

Question 15

The process of ________ requires participation of tRNA molecules.

Accepted Answer

A)   DNA replication
B)   capping
C)   transcription
D)   translation
E)   gene regulation

Exam 7: Microbial Genetics

Prokaryotic operons typically include a(n) and a(n) with multiple genes.

Correct Answer
verified

DNA damage caused by nitrous acid results in ________ mutations.

Correct Answer
verified

A protein has altered function as a result of a single amino acid substitution in the polypeptide.This change resulted from a (missense/nonsense/silent)mutation.

Correct Answer
verified

A polypeptide in a wild type microbe contains the sequence Leu-Pro-Tyr-Ser-Pro.A phenotypic variant of the species has the peptide sequence Leu-Pro-Cys-Ser-Pro.This is an example of a(n) ________ mutation.

Correct Answer
verified

Which of the following is characteristic of prokaryotic genomes but not eukaryotic genomes?

Correct Answer
verified

The Ames test demonstrates that a chemical is

Correct Answer
verified

Which of the following is involved in translation?

Correct Answer
verified

Except during initiation of translation,transfer RNA molecules carrying amino acids initially bind to the ribosome at the (P/A/E)site.

Correct Answer
verified

During elongation,a charged tRNA first enters the ribosomal site and then moves into the site.

Correct Answer
verified

Most bacteria have a natural ability to take up DNA from their environment.

Correct Answer
verified

The process of ________ requires participation of tRNA molecules.

Correct Answer
verified

Prokaryotic cells are diploid.

Correct Answer
verified

RNA polymerase is primarily responsible for

Correct Answer
verified

Which of the following is NOT a characteristic of both DNA and RNA polymerases?

Correct Answer
verified

You observe a microbiologist examining two plates and notice the pattern of colonies are nearly identical with the exception of a few colonies that are absent on one of them.The plates likely were produced by

Correct Answer
verified

Exam 7: Microbial Genetics

Prokaryotic operons typically include a(n) ________ and a(n) ________ with multiple genes.

Correct AnswerverifiedShow Answer

DNA damage caused by nitrous acid results in ________ mutations.

Correct AnswerverifiedShow Answer

A protein has altered function as a result of a single amino acid substitution in the polypeptide.This change resulted from a (missense/nonsense/silent)mutation.

Correct AnswerverifiedShow Answer

A polypeptide in a wild type microbe contains the sequence Leu-Pro-Tyr-Ser-Pro.A phenotypic variant of the species has the peptide sequence Leu-Pro-Cys-Ser-Pro.This is an example of a(n) ________ mutation.

Correct AnswerverifiedShow Answer

Which of the following is characteristic of prokaryotic genomes but not eukaryotic genomes?

Correct AnswerverifiedShow Answer

The Ames test demonstrates that a chemical is

Correct AnswerverifiedShow Answer

Which of the following is involved in translation?

Correct AnswerverifiedShow Answer

Except during initiation of translation,transfer RNA molecules carrying amino acids initially bind to the ribosome at the (P/A/E)site.

Correct AnswerverifiedShow Answer

During elongation,a charged tRNA first enters the ribosomal ________ site and then moves into the ________ site.

Correct AnswerverifiedShow Answer

Most bacteria have a natural ability to take up DNA from their environment.

Correct AnswerverifiedShow Answer

The process of ________ requires participation of tRNA molecules.

Correct AnswerverifiedShow Answer

Prokaryotic cells are diploid.

Correct AnswerverifiedShow Answer

RNA polymerase is primarily responsible for

Correct AnswerverifiedShow Answer

Which of the following is NOT a characteristic of both DNA and RNA polymerases?

Correct AnswerverifiedShow Answer

You observe a microbiologist examining two plates and notice the pattern of colonies are nearly identical with the exception of a few colonies that are absent on one of them.The plates likely were produced by

Correct AnswerverifiedShow Answer

Prokaryotic operons typically include a(n) and a(n) with multiple genes.

Correct Answer
verified

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During elongation,a charged tRNA first enters the ribosomal site and then moves into the site.

Correct Answer
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