Question 1

How is the HIV provirus different from a lambda-phage prophage?

Accepted Answer

A)  the HIV provirus is integrated permanently into the host cell's DNA. 
B)  all subsequent generations of HIV-infected cells carry the provirus. 
C)  all the offspring of a cell infected with a prophage will contain the virus. 
D)  the HIV provirus is inactive inside the host cell. 
E)  lambda phage-infected cells produce virus slowly over time. 
A)  the HIV provirus is integrated permanently into the host cell's DNA. 
B)  all subsequent generations of HIV-infected cells carry the provirus. 
C)  all the offspring of a cell infected with a prophage will contain the virus. 
D)  the HIV provirus is inactive inside the host cell. 
E)  lambda phage-infected cells produce virus slowly over time. A

Question 2

Small circular RNAs called ________ are plant pathogens.

Accepted Answer

A)  plasmids 
B)  viruses 
C)  viroids 
D)  prions 
E)  phages 
A)  plasmids 
B)  viruses 
C)  viroids 
D)  prions 
E)  phages C

Question 3

Genes that play a role in proper cell division but may also play a role in some types of cancer are called (oncogenes/protooncogenes/promoters).

Accepted Answer

protooncogenes

Question 4

Budding release of virus may result in long lasting or persistent infection.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is associated with the attachment of a bacteriophage to a bacterial cell?

Accepted Answer

A)  random collisions 
B)  chemical attractions 
C)  receptor specificity 
D)  both chemical attractions and receptor specificity 
E)  random collisions, chemical attractions, and receptor specificity 
A)  random collisions 
B)  chemical attractions 
C)  receptor specificity 
D)  both chemical attractions and receptor specificity 
E)  random collisions, chemical attractions, and receptor specificity

Question 6

Describe the mechanism by which PrP is infectious.

Accepted Answer

The clue to why PrP acts as an infectiou

Question 7

The enzyme lysozyme is critical for which of the stages of a bacteriophage T4 infection cycle?

Accepted Answer

A)  entry 
B)  assembly 
C)  entry and release 
D)  synthesis 
E)  attachment 
A)  entry 
B)  assembly 
C)  entry and release 
D)  synthesis 
E)  attachment

Question 8

Why is the synthesis of mRNA a central issue for all viruses? How do different types of viruses achieve this goal?

Accepted Answer

One way in which a virus gains control o

Question 9

How are prions different from all other known infectious agents?

Accepted Answer

A)  they cannot reproduce outside a cell. 
B)  they act as slow viruses. 
C)  they cause neurological problems. 
D)  they can be destroyed by incineration. 
E)  they lack nucleic acid. 
A)  they cannot reproduce outside a cell. 
B)  they act as slow viruses. 
C)  they cause neurological problems. 
D)  they can be destroyed by incineration. 
E)  they lack nucleic acid.

Question 10

Members of a virus family have the same type of nucleic acid.

Accepted Answer

A) True 
 B)False

Question 11

Why is lysogeny advantageous to a bacteriophage?

Accepted Answer

A)  it speeds up the viral infection cycle. 
B)  the genetic material of the bacteriophage is amplified many times over that seen in a lytic phage. 
C)  it allows the bacteriophage to infect cells it would not normally infect. 
D)  it allows the bacteriophage to destroy the host cell's DNA. 
E)  it enables the bacteriophage to take over the cell. 
A)  it speeds up the viral infection cycle. 
B)  the genetic material of the bacteriophage is amplified many times over that seen in a lytic phage. 
C)  it allows the bacteriophage to infect cells it would not normally infect. 
D)  it allows the bacteriophage to destroy the host cell's DNA. 
E)  it enables the bacteriophage to take over the cell.

Question 12

A "naked" virus lacks (lipid/nucleic acid/protein).

Accepted Answer

The answer of A "naked" virus lacks (lipid/nucleic acid/protein)....

Question 13

Which of the following infectious particles do not have protein in their structure?

Accepted Answer

A)  bacteriophages 
B)  prions 
C)  animal viruses 
D)  viroids 
E)  both prions and viroids 
A)  bacteriophages 
B)  prions 
C)  animal viruses 
D)  viroids 
E)  both prions and viroids

Question 14

Another term for a lysogenic phage is a (temperate/latent/prophage) phage.

Accepted Answer

The answer of Another term for a lysogenic phage is...

Question 15

Disadvantages of continuous cell cultures include

Accepted Answer

A)  they only grow for a limited number of generations. 
B)  the expense of preparation. 
C)  they may be significantly different genetically from the original source animal. 
D)  viruses do not reliably infect them. 
E)  they are both expensive and have a limited number of division. 
A)  they only grow for a limited number of generations. 
B)  the expense of preparation. 
C)  they may be significantly different genetically from the original source animal. 
D)  viruses do not reliably infect them. 
E)  they are both expensive and have a limited number of division.

Question 16

A lipid membrane is present in which of the following?

Accepted Answer

A)  naked viruses 
B)  enveloped viruses 
C)  prions 
D)  viroids 
E)  both prions and viroids 
A)  naked viruses 
B)  enveloped viruses 
C)  prions 
D)  viroids 
E)  both prions and viroids

Question 17

A ________ is a mass of neoplastic cells.

Accepted Answer

A)  diploid culture 
B)  metastasis 
C)  tumor 
D)  gall 
E)  plaque 
A)  diploid culture 
B)  metastasis 
C)  tumor 
D)  gall 
E)  plaque

Question 18

Which of the following types of animal virus requires RNA-dependent RNA transcriptase to be replicated?

Accepted Answer

A)  +ssRNA viruses 
B)  ssDNA viruses 
C)  -ssRNA viruses 
D)  retroviruses 
E)  dsDNA viruses 
A)  +ssRNA viruses 
B)  ssDNA viruses 
C)  -ssRNA viruses 
D)  retroviruses 
E)  dsDNA viruses

Question 19

Which of the following is a characteristic by which viruses are classified?

Accepted Answer

A)  type of nucleic acid 
B)  type of life cycle 
C)  number of chromosomes 
D)  type of host 
E)  size 
A)  type of nucleic acid 
B)  type of life cycle 
C)  number of chromosomes 
D)  type of host 
E)  size

Question 20

Which of the following events occurs in the lytic cycle of bacteriophage T4 infection but not in the lysogenic cycle?

Accepted Answer

A)  attachment 
B)  entry 
C)  digestion of host DNA 
D)  viral protein synthesis 
E)  both digestion of host DNA and viral proteins synthesis 
A)  attachment 
B)  entry 
C)  digestion of host DNA 
D)  viral protein synthesis 
E)  both digestion of host DNA and viral proteins synthesis

Exam 13: Characterizing and Classifying Viruses, Viroids, and Prions

How is the HIV provirus different from a lambda-phage prophage?

Small circular RNAs called ________ are plant pathogens.

Genes that play a role in proper cell division but may also play a role in some types of cancer are called (oncogenes/protooncogenes/promoters).

Budding release of virus may result in long lasting or persistent infection.

Which of the following is associated with the attachment of a bacteriophage to a bacterial cell?

Describe the mechanism by which PrP is infectious.

The enzyme lysozyme is critical for which of the stages of a bacteriophage T4 infection cycle?

Why is the synthesis of mRNA a central issue for all viruses? How do different types of viruses achieve this goal?

How are prions different from all other known infectious agents?

Members of a virus family have the same type of nucleic acid.

Why is lysogeny advantageous to a bacteriophage?

A "naked" virus lacks (lipid/nucleic acid/protein).

Which of the following infectious particles do not have protein in their structure?

Another term for a lysogenic phage is a (temperate/latent/prophage) phage.

Disadvantages of continuous cell cultures include

A lipid membrane is present in which of the following?

A ________ is a mass of neoplastic cells.

Which of the following types of animal virus requires RNA-dependent RNA transcriptase to be replicated?

Which of the following is a characteristic by which viruses are classified?

Which of the following events occurs in the lytic cycle of bacteriophage T4 infection but not in the lysogenic cycle?

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Microbial Genetics

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

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Immune Disorders

Microbial Diseases of the Skin and Wounds

Microbial Diseases of the Nervous System and Eyes

Microbial Cardiovascular and Systemic Diseases

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Diseases of the Urinary and Reproductive Systems

Applied and Industrial Microbiology

Microbial Ecology and Microbiomes

Filters