Question 1

What is a prophage?

Accepted Answer

A)  It is a bacterial cell about to lyse. 
B)  It is an underdeveloped lytic virus. 
C)  It is phage DNA that is integrated into viral DNA. 
D)  It is phage DNA that is integrated into bacterial DNA. 
E)  It is when the phage is attached to the cell surface of the bacterium. 
A)  It is a bacterial cell about to lyse. 
B)  It is an underdeveloped lytic virus. 
C)  It is phage DNA that is integrated into viral DNA. 
D)  It is phage DNA that is integrated into bacterial DNA. 
E)  It is when the phage is attached to the cell surface of the bacterium.

Question 2

At what stage of the lysogenic cycle would a prophage appear?

Accepted Answer

A)  Penetration 
B)  Integration 
C)  Attachment 
D)  Replication 
E)  Assembly 
A)  Penetration 
B)  Integration 
C)  Attachment 
D)  Replication 
E)  Assembly

Question 3

Which characteristic defines a virus?

Accepted Answer

A)  Viruses cannot replicate. 
B)  Viruses cannot metabolize. 
C)  Viruses contain both RNA and DNA. 
D)  Viruses have various morphologies. 
E)  Viruses are very tiny cells with nuclei. 
A)  Viruses cannot replicate. 
B)  Viruses cannot metabolize. 
C)  Viruses contain both RNA and DNA. 
D)  Viruses have various morphologies. 
E)  Viruses are very tiny cells with nuclei.

Question 4

An emerging virus is one that is not new to a population or that is rapidly increasing in incidence.

Accepted Answer

A) True 
 B)False

Question 5

At what stage of a lytic infection are phage components put together to make new viruses?

Accepted Answer

A)  Replication and synthesis 
B)  Penetration 
C)  Attachment 
D)  Assembly 
E)  Release 
A)  Replication and synthesis 
B)  Penetration 
C)  Attachment 
D)  Assembly 
E)  Release

Question 6

What are the viruses that attack bacteria?

Accepted Answer

A)  Phages 
B)  Virions 
C)  Prions 
D)  Satellites 
E)  Adenoviruses 
A)  Phages 
B)  Virions 
C)  Prions 
D)  Satellites 
E)  Adenoviruses

Question 7

Describe the defenses of plants against viruses and explain why infected plants are destroyed.

Accepted Answer

Concepts to Consider: Plants have thick

Question 8

When a virus penetrates the host plasma membrane and moves into the cytoplasm it is called:

Accepted Answer

A)  release. 
B)  adsorption. 
C)  penetration. 
D)  replication and synthesis. 
E)  assembly. 
A)  release. 
B)  adsorption. 
C)  penetration. 
D)  replication and synthesis. 
E)  assembly.

Question 9

How do retroviruses differ from other RNA viruses?

Accepted Answer

A)  Retroviruses have a unique capsid shape. 
B)  Retroviruses lytically destroy their hosts. 
C)  Retroviruses have a unique infection technique of their host cells. 
D)  Retroviruses have a capsid composed of protein and carbohydrates. 
E)  Retroviruses have reverse transcriptase instead of RNA-dependent RNA polymerase. 
A)  Retroviruses have a unique capsid shape. 
B)  Retroviruses lytically destroy their hosts. 
C)  Retroviruses have a unique infection technique of their host cells. 
D)  Retroviruses have a capsid composed of protein and carbohydrates. 
E)  Retroviruses have reverse transcriptase instead of RNA-dependent RNA polymerase.

Question 10

What is the protein coat of a virus called?

Accepted Answer

A)  Envelope 
B)  Capsule 
C)  Capsid 
D)  Phage 
E)  Pilus 
A)  Envelope 
B)  Capsule 
C)  Capsid 
D)  Phage 
E)  Pilus

Question 11

The immunodeficiency virus that causes acquired immunodeficiency syndrome is an enveloped virus.

Accepted Answer

A) True 
 B)False

Question 12

_______________ are those that have been almost eradicated and then suddenly recur, causing an epidemic.

Accepted Answer

A)  Retroviruses 
B)  Emerging viruses 
C)  Re-emerging viruses 
D)  Zoonotic diseases 
E)  RNA viruses 
A)  Retroviruses 
B)  Emerging viruses 
C)  Re-emerging viruses 
D)  Zoonotic diseases 
E)  RNA viruses

Question 13

Which of the following are responsible for some very serious diseases, including Ebola hemorrhagic fever?

Accepted Answer

A)  Pathogens 
B)  Respiratory diseases 
C)  Tuberculosis 
D)  Digestive diseases 
E)  Diarrheal diseases 
A)  Pathogens 
B)  Respiratory diseases 
C)  Tuberculosis 
D)  Digestive diseases 
E)  Diarrheal diseases

Question 14

Lytic reproductive cycles destroy host cells.

Accepted Answer

A) True 
 B)False

Question 15

Bacteriophages decrease food safety.

Accepted Answer

A) True 
 B)False

Exam 24: Viruses and Subviral Agents

What is a prophage?

At what stage of the lysogenic cycle would a prophage appear?

Which characteristic defines a virus?

An emerging virus is one that is not new to a population or that is rapidly increasing in incidence.

At what stage of a lytic infection are phage components put together to make new viruses?

What are the viruses that attack bacteria?

Describe the defenses of plants against viruses and explain why infected plants are destroyed.

When a virus penetrates the host plasma membrane and moves into the cytoplasm it is called:

How do retroviruses differ from other RNA viruses?

What is the protein coat of a virus called?

The immunodeficiency virus that causes acquired immunodeficiency syndrome is an enveloped virus.

_______________ are those that have been almost eradicated and then suddenly recur, causing an epidemic.

Which of the following are responsible for some very serious diseases, including Ebola hemorrhagic fever?

Lytic reproductive cycles destroy host cells.

Bacteriophages decrease food safety.

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

DNA: The Carrier of Genetic Information

Gene Expression

Gene Regulation

DNA Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

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