Question 1

The genome of which of the following types of animal virus can act directly as mRNA?

Accepted Answer

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

Question 2

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

Accepted Answer

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

Question 3

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

Accepted Answer

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

Question 4

The combination of a virus's protein coat and nucleic acid core is called the (capsid/virion/nucleocapsid).

Accepted Answer

The answer of The combination of a virus's protein coat...

Question 5

Uncontrolled cell division in animals is known as (metastasis/neoplasia/cancer).

Accepted Answer

The answer of Uncontrolled cell division in animals is known...

Question 6

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

Accepted Answer

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

Question 7

Three (orders/families/classes) represent the highest level of taxonomic rank used in classifying viruses.

Accepted Answer

The answer of Three (orders/families/classes) represent the highest level of...

Question 8

How are fungal viruses different from viruses that infect other organisms?

Accepted Answer

A)  They have only DNA for genetic material. 
B)  They have no capsid. 
C)  They have no extracellular state. 
D)  They have no intracellular state. 
E)  They cannot pass through a filter. 
A)  They have only DNA for genetic material. 
B)  They have no capsid. 
C)  They have no extracellular state. 
D)  They have no intracellular state. 
E)  They cannot pass through a filter.

Question 9

The process known as _ is a mechanism of release for enveloped viruses.

Accepted Answer

A)  latency 
B)  metastasis 
C)  persistent infection 
D)  lytic replication 
E)  budding 
A)  latency 
B)  metastasis 
C)  persistent infection 
D)  lytic replication 
E)  budding

Question 10

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

Accepted Answer

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

Question 11

Many diseases of plants are caused by infectious RNA molecules lacking capsids.

Accepted Answer

A) True 
 B)False

Question 12

The virions shown in the figure have a (polyhedral/helical/complex) capsid.

Accepted Answer

The answer of   The virions shown in the...

Question 13

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

The answer of Genes that play a role in proper...

Question 14

Viral capsids are composed of subunits called (nucleocapsids/capsomeres).

Accepted Answer

The answer of Viral capsids are composed of subunits called...

Question 15

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

Accepted Answer

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

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

The genome of which of the following types of animal virus can act directly as mRNA?

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

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

The combination of a virus's protein coat and nucleic acid core is called the (capsid/virion/nucleocapsid).

Uncontrolled cell division in animals is known as (metastasis/neoplasia/cancer).

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

Three (orders/families/classes) represent the highest level of taxonomic rank used in classifying viruses.

How are fungal viruses different from viruses that infect other organisms?

The process known as _ is a mechanism of release for enveloped viruses.

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

Many diseases of plants are caused by infectious RNA molecules lacking capsids.

The virions shown in the figure have a (polyhedral/helical/complex) capsid.

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).

Viral capsids are composed of subunits called (nucleocapsids/capsomeres).

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 Disease, 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

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