Question 1

A prion is composed of:

Accepted Answer

A) RNA 
B) DNA 
C) proteins 
D) both DNA and RNA 
A) RNA 
B) DNA 
C) proteins 
D) both DNA and RNA C

Question 2

Assembly of new viral components into a complete virion takes place during viral _____.

Accepted Answer

A) maturation 
B) adsorption 
C) penetration 
D) synthesis 
A) maturation 
B) adsorption 
C) penetration 
D) synthesis A

Question 3

Which structure of the herpesvirus is represented by the arrow

Accepted Answer

A) Capsid 
B) Nucleic acid core 
C) Spikes 
D) Envelope 
A) Capsid 
B) Nucleic acid core 
C) Spikes 
D) Envelope D

Question 4

An uncontrolled,invasive growth of abnormal cells is referred to as _____.

Accepted Answer

A) transduction 
B) cancer 
C) induction 
D) transformation 
E) none of these choices 
A) transduction 
B) cancer 
C) induction 
D) transformation 
E) none of these choices

Question 5

Advantages provided by the viral envelope include:

Accepted Answer

A) helping viruses infect new cells by fusion of the envelope with the host's plasma membrane. 
B) helping viruses "hide" from attack by the host's immune system. 
C) resistance to extreme pH (below 6 or above 8). 
D) both helping viruses infect new cells by fusion of the envelope with the host's plasma membrane and helping "hide" from attack by the host's immune system. 
A) helping viruses infect new cells by fusion of the envelope with the host's plasma membrane. 
B) helping viruses "hide" from attack by the host's immune system. 
C) resistance to extreme pH (below 6 or above 8). 
D) both helping viruses infect new cells by fusion of the envelope with the host's plasma membrane and helping "hide" from attack by the host's immune system.

Question 6

A latent viral infection is an infection in which:

Accepted Answer

A) viral replication is slow 
B) viruses remains within host cells without causing a disease 
C) a viral infection causes a disease progression gradually over a long period 
D) viral replication has stopped but may resume years or decades later upon reactivation 
A) viral replication is slow 
B) viruses remains within host cells without causing a disease 
C) a viral infection causes a disease progression gradually over a long period 
D) viral replication has stopped but may resume years or decades later upon reactivation

Question 7

Which of the following is used by negative strand RNA viruses such as measles and influenza during their replication cycle

Accepted Answer

A) synthesize DNA via reverse transcriptase 
B) synthesize a double stranded RNA intermediate 
C) synthesize an RNA:DNA hybrid whose RNA is a (+)strand 
D) synthesize an RNA:DNA hybrid whose DNA is a (-)strand 
A) synthesize DNA via reverse transcriptase 
B) synthesize a double stranded RNA intermediate 
C) synthesize an RNA:DNA hybrid whose RNA is a (+)strand 
D) synthesize an RNA:DNA hybrid whose DNA is a (-)strand

Question 8

Acquired Immune Deficiency Syndrome (AIDS)is caused by a retrovirus.Which of the following best represents the genetic information flow used by retroviruses

Accepted Answer

A) DNA --> mRNA --> protein 
B) DNA --> protein 
C) RNA --> DNA --> mRNA --> protein 
D) RNA --> protein 
A) DNA --> mRNA --> protein 
B) DNA --> protein 
C) RNA --> DNA --> mRNA --> protein 
D) RNA --> protein

Question 9

A drug or other agent that induces defects during embryonic development is known as a:

Accepted Answer

A) syncytia 
B) capsomere 
C) teratogen 
D) carcinogen 
A) syncytia 
B) capsomere 
C) teratogen 
D) carcinogen

Question 10

Recognition of the proper host cell by an animal virus may be aided by the ________ of the virus.

Accepted Answer

A) spikes 
B) tail fibers 
C) DNA 
D) cell membrane 
A) spikes 
B) tail fibers 
C) DNA 
D) cell membrane

Question 11

A viral infection is treated with a drug designed to inhibit reverse transcriptase.Which of the following viruses would NOT be affected

Accepted Answer

A) Human Immunodeficiency virus 
B) Murine leukemia virus 
C) Hepatitis B virus 
D) None of these choices 
A) Human Immunodeficiency virus 
B) Murine leukemia virus 
C) Hepatitis B virus 
D) None of these choices

Question 12

Because viruses such as bacteriophages lead to bursting of the bacterial host cell they are known as ________ viruses.

Accepted Answer

A) lytic 
B) lysogenic 
C) recurring 
D) lethal 
A) lytic 
B) lysogenic 
C) recurring 
D) lethal

Question 13

Which of the following explains how DNA tumor viruses may cause human cancers

Accepted Answer

A) viral proteins infect other uninfected host cells. 
B) viral proteins block the effect of tumor-suppressor genes which prevent uncontrolled cell division. 
C) viral particles infect sex cells and transmit the virions to offspring. 
D) use viral reverse transcriptase to integrate the DNA tumor viruses into the host chromosome. 
A) viral proteins infect other uninfected host cells. 
B) viral proteins block the effect of tumor-suppressor genes which prevent uncontrolled cell division. 
C) viral particles infect sex cells and transmit the virions to offspring. 
D) use viral reverse transcriptase to integrate the DNA tumor viruses into the host chromosome.

Question 14

Plaques are:

Accepted Answer

A) bacterial colonies 
B) another name for single viruses 
C) areas where bacterial cells have been lysed 
D) bacterial film 
A) bacterial colonies 
B) another name for single viruses 
C) areas where bacterial cells have been lysed 
D) bacterial film

Question 15

What would be a reasonable of new phages to expect from one round of viral replication in one cell

Accepted Answer

A) 2 
B) 100 
C) 1000 
D) 10000 
A) 2 
B) 100 
C) 1000 
D) 10000

Question 16

Which of the following viruses are known for causing latent infections

Accepted Answer

A) adenoviruses 
B) herpesviruses 
C) poxviruses 
D) parvoviruses 
A) adenoviruses 
B) herpesviruses 
C) poxviruses 
D) parvoviruses

Question 17

Viroids are composed of ______.

Accepted Answer

A) single infectious proteins 
B) double stranded RNA 
C) single-stranded linear DNA 
D) single-stranded circular RNA 
A) single infectious proteins 
B) double stranded RNA 
C) single-stranded linear DNA 
D) single-stranded circular RNA

Question 18

A rare form of cancer that has become common among men with AIDS is:

Accepted Answer

A) Kaposi's sarcoma 
B) Pneumocystis carinii pneumonia 
C) Tuberculosis 
D) Burkitt's lymphoma 
A) Kaposi's sarcoma 
B) Pneumocystis carinii pneumonia 
C) Tuberculosis 
D) Burkitt's lymphoma

Question 19

Malignant tumors and their cells can ____ to other locations and organs in the body.

Accepted Answer

A) metastasize 
B) begin 
C) stagnate 
D) end 
A) metastasize 
B) begin 
C) stagnate 
D) end

Question 20

The families of RNA viruses are distinguished from one another by all of the following EXCEPT:

Accepted Answer

A) presence of an envelope 
B) shape of the capsid 
C) sense or antisense RNA 
D) whether RNA is linear or circular 
A) presence of an envelope 
B) shape of the capsid 
C) sense or antisense RNA 
D) whether RNA is linear or circular

Exam 11: Viruses

A prion is composed of:

Assembly of new viral components into a complete virion takes place during viral _____.

Which structure of the herpesvirus is represented by the arrow

An uncontrolled,invasive growth of abnormal cells is referred to as _____.

Advantages provided by the viral envelope include:

A latent viral infection is an infection in which:

Which of the following is used by negative strand RNA viruses such as measles and influenza during their replication cycle

Acquired Immune Deficiency Syndrome (AIDS)is caused by a retrovirus.Which of the following best represents the genetic information flow used by retroviruses

A drug or other agent that induces defects during embryonic development is known as a:

Recognition of the proper host cell by an animal virus may be aided by the ________ of the virus.

A viral infection is treated with a drug designed to inhibit reverse transcriptase.Which of the following viruses would NOT be affected

Because viruses such as bacteriophages lead to bursting of the bacterial host cell they are known as ________ viruses.

Which of the following explains how DNA tumor viruses may cause human cancers

Plaques are:

What would be a reasonable of new phages to expect from one round of viral replication in one cell

Which of the following viruses are known for causing latent infections

Viroids are composed of ______.

A rare form of cancer that has become common among men with AIDS is:

Malignant tumors and their cells can ____ to other locations and organs in the body.

The families of RNA viruses are distinguished from one another by all of the following EXCEPT:

Scope and History of Microbiology

The Microbiome

Fundamentals of Chemistry

Microscopy and Staining

Characteristics of Prokaryotic and Eukaryotic Cells

Essential Concepts of Metabolism

Growth and Culturing of Bacteria

Microbial Genetics

Gene Transfer and Genetic Engineering

An Introduction to Taxonomy: The Bacteria

Eukaryotic Microorganisms and Parasites

Sterilization and Disinfection

Antimicrobial Therapy

Host-Microbe Relationships and Disease Processes

Epidemiology and Nosocomial Infections

Innate Host Defenses

Basic Principles of Adaptive Immunity and Immunization

Immune Disorders

Diseases of the Skin and Eyes; Wounds and Bites

Urogenital and Sexually Transmitted Diseases

Diseases of the Respiratory System

Oral and Gastrointestinal Diseases

Cardiovascular, Lymphatic, and Systemic Diseases

Diseases of the Nervous System

Environmental Microbiology

Applied Microbiology

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