Question 1

Match between columns
                        Premises: Herpesviruses

Accepted Answer

The Answer of ssRNA enveloped viruses; contains reverse transcriptase for is...

Question 2

According to the progressive hypothesis , viruses may have originated as mobile genetic elements such as:

Accepted Answer

A)  mRNA. 
B)  alleles. 
C)  plasmids. 
D)  enzymes. 
E)  ribosomes. 
A)  mRNA. 
B)  alleles. 
C)  plasmids. 
D)  enzymes. 
E)  ribosomes.

Question 3

The bacterium that causes botulism disease is harmless until it:

Accepted Answer

A)  is infected by prions. 
B)  is infected by lytic bacteria. 
C)  is irradiated by UV radiation. 
D)  contains a certain prophage DNA. 
E)  is infected by certain retroviruses. 
A)  is infected by prions. 
B)  is infected by lytic bacteria. 
C)  is irradiated by UV radiation. 
D)  contains a certain prophage DNA. 
E)  is infected by certain retroviruses.

Question 4

Match between columns
                        Premises: Orthomyxoviruses

Accepted Answer

The Answer of dsDNA: large complex enveloped virus; replicates in is...

Question 5

Which of the following typically occurs all at once and results in rapid cell lysis?

Accepted Answer

A)  Penetration 
B)  Replication and synthesis 
C)  Phage release 
D)  Viral components 
E)  Viral contrast 
A)  Penetration 
B)  Replication and synthesis 
C)  Phage release 
D)  Viral components 
E)  Viral contrast

Question 6

A virus is a very small infective agent that consists of a core of nucleic acid and is dependent on a living host.

Accepted Answer

A) True 
 B)False

Question 7

Which statement describes a temperate virus?

Accepted Answer

A)  A temperate virus undergoes a lytic cycle. 
B)  A temperate virus is considered virulent. 
C)  A temperate virus does not always destroy its host. 
D)  A temperate virus does not undergo a lysogenic cycle. 
E)  A temperate virus always destroys their host immediately. 
A)  A temperate virus undergoes a lytic cycle. 
B)  A temperate virus is considered virulent. 
C)  A temperate virus does not always destroy its host. 
D)  A temperate virus does not undergo a lysogenic cycle. 
E)  A temperate virus always destroys their host immediately.

Question 8

Compare the three hypotheses that explain the evolution of viruses

Accepted Answer

CONCEPTS TO CONSIDER : According to the

Question 9

Which statement about viruses is FALSE ?

Accepted Answer

A)  Viruses are not cellular. 
B)  Viruses can manufacture proteins. 
C)  Viruses cannot carry on metabolic activities. 
D)  Viruses can only replicate by infecting other cells. 
E)  Viruses have a protective protein coat called a capsid. 
A)  Viruses are not cellular. 
B)  Viruses can manufacture proteins. 
C)  Viruses cannot carry on metabolic activities. 
D)  Viruses can only replicate by infecting other cells. 
E)  Viruses have a protective protein coat called a capsid.

Question 10

Which of the following are RNA viruses that have a DNA polymerase?

Accepted Answer

A)  Norwalk virus 
B)  Measles virus 
C)  Protein synthesis 
D)  DNA replication 
E)  Retroviruses 
A)  Norwalk virus 
B)  Measles virus 
C)  Protein synthesis 
D)  DNA replication 
E)  Retroviruses

Question 11

Viroids cause a variety of plant diseases and are composed only of:

Accepted Answer

A)  strands of RNA. 
B)  strands of DNA. 
C)  protein coats. 
D)  peptidoglycan. 
E)  a capsid. 
A)  strands of RNA. 
B)  strands of DNA. 
C)  protein coats. 
D)  peptidoglycan. 
E)  a capsid.

Question 12

_______________ are RNA viruses that have a DNA polymerase called reverse transcriptase, which transcribes the RNA genome into a DNA intermediate.

Accepted Answer

A)  Coxsackie viruses 
B)  Feline caliciviruses 
C)  Usutu viruses 
D)  Tobacco etch viruses 
E)  Retroviruses 
A)  Coxsackie viruses 
B)  Feline caliciviruses 
C)  Usutu viruses 
D)  Tobacco etch viruses 
E)  Retroviruses

Question 13

What does ss DNA stand for?

Accepted Answer

A)  Single stranded DNA 
B)  Simple satellite DNA 
C)  Single synthesis DNA 
D)  Simple synthase DNA 
E)  Synthetic strand DNA 
A)  Single stranded DNA 
B)  Simple satellite DNA 
C)  Single synthesis DNA 
D)  Simple synthase DNA 
E)  Synthetic strand DNA

Question 14

What type of conversion occurs when a bacterium carrying viral genes takes on new, atypical characteristics?

Accepted Answer

A)  Transducing 
B)  Lysogenic 
C)  Prophage 
D)  Reverse 
E)  Lytic 
A)  Transducing 
B)  Lysogenic 
C)  Prophage 
D)  Reverse 
E)  Lytic

Question 15

Compare a viral lytic cycle and a viral lysogenic cycle.

Accepted Answer

In a lytic infection, the virus destroys

Question 16

Briefly explain reason why the measles virus can infect many human tissues, whereas the influenza virus can infect only one type of tissue.

Accepted Answer

Measles virus has attachment p

Question 17

What is the correct unit of measurement for the size of most viruses?

Accepted Answer

A)  Picometers 
B)  Nanometers 
C)  Micrometers 
D)  Centimeters 
E)  Decimeters 
A)  Picometers 
B)  Nanometers 
C)  Micrometers 
D)  Centimeters 
E)  Decimeters

Question 18

The genome of most plant viruses consists of what kind of RNA?

Accepted Answer

A)  rRNA 
B)  mRNA 
C)  ssRNA 
D)  dsRNA 
E)  SRP RNA 
A)  rRNA 
B)  mRNA 
C)  ssRNA 
D)  dsRNA 
E)  SRP RNA

Question 19

Which hypothesis asserts that viruses are remnants of cellular organisms and evolved from small cells that were parasites in larger cells?

Accepted Answer

A)  Escape hypothesis 
B)  Virus-first hypothesis 
C)  Regressive hypothesis 
D)  Progressive hypothesis 
E)  Degenerative hypothesis 
A)  Escape hypothesis 
B)  Virus-first hypothesis 
C)  Regressive hypothesis 
D)  Progressive hypothesis 
E)  Degenerative hypothesis

Question 20

Who is credited with the discovery of prions as a new biological principle of infection?

Accepted Answer

A)  Anton van Leeuwenhoek 
B)  Dmitrii Ivanowsky 
C)  Stanley Prusiner 
D)  Stanley Brenner 
E)  Carl Woese 
A)  Anton van Leeuwenhoek 
B)  Dmitrii Ivanowsky 
C)  Stanley Prusiner 
D)  Stanley Brenner 
E)  Carl Woese

Exam 24: Viruses and Subviral Agents

According to the progressive hypothesis , viruses may have originated as mobile genetic elements such as:

The bacterium that causes botulism disease is harmless until it:

Which of the following typically occurs all at once and results in rapid cell lysis?

A virus is a very small infective agent that consists of a core of nucleic acid and is dependent on a living host.

Which statement describes a temperate virus?

Compare the three hypotheses that explain the evolution of viruses

Which statement about viruses is FALSE ?

Which of the following are RNA viruses that have a DNA polymerase?

Viroids cause a variety of plant diseases and are composed only of:

_______________ are RNA viruses that have a DNA polymerase called reverse transcriptase, which transcribes the RNA genome into a DNA intermediate.

What does ss DNA stand for?

What type of conversion occurs when a bacterium carrying viral genes takes on new, atypical characteristics?

Compare a viral lytic cycle and a viral lysogenic cycle.

Briefly explain reason why the measles virus can infect many human tissues, whereas the influenza virus can infect only one type of tissue.

What is the correct unit of measurement for the size of most viruses?

The genome of most plant viruses consists of what kind of RNA?

Which hypothesis asserts that viruses are remnants of cellular organisms and evolved from small cells that were parasites in larger cells?

Who is credited with the discovery of prions as a new biological principle of infection?

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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