Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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 3

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

Question 4

Prokaryotic cells are diploid.

Accepted Answer

A) True 
 B)False

Question 5

DNA damage caused by nitrous acid results in ________ mutations.

Accepted Answer

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

Question 6

The process of ________ requires participation of tRNA molecules.

Accepted Answer

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

Question 7

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

Question 8

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 
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 9

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

Question 10

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 11

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

Question 12

RNA polymerase is primarily responsible for

Accepted Answer

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

Question 13

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

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

Question 15

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

Exam 7: Microbial Genetics

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

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

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

Prokaryotic cells are diploid.

DNA damage caused by nitrous acid results in ________ mutations.

The process of ________ requires participation of tRNA molecules.

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

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

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

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.

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

RNA polymerase is primarily responsible for

The Ames test demonstrates that a chemical is

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.

Which of the following is involved in translation?

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Recombinant DNA Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Immune Disorders

Pathogenic Gram Positive Bacteria

Pathogenic Gram-Negative Cocci and Bacilli

Rickettsias, Chlamydias, Spirochetes, and Vibrios

Pathogenic Fungi

Parasitic Protozoa, Helminths, and Arthropod Vectors

Pathogenic DNA Viruses

Pathogenic RNA Viruses

Applied and Environmental Microbiology

Filters

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

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