Question 1

Explain the difference between an enveloped virus and a naked virus.

Accepted Answer

A naked virus lacks an envelope and is c

Question 2

A prophage replicates

Accepted Answer

A)  independently of its host while the lytic genes are expressed. 
B)  independently of its host while the lytic genes are not expressed. 
C)  along with its host while the lytic genes are expressed. 
D)  along with its host while the lytic genes are not expressed. 
A)  independently of its host while the lytic genes are expressed. 
B)  independently of its host while the lytic genes are not expressed. 
C)  along with its host while the lytic genes are expressed. 
D)  along with its host while the lytic genes are not expressed.

Question 3

Viral replication occurs

Accepted Answer

A)  extracellularly. 
B)  intracellularly. 
C)  both intracellularly and extracellularly. 
D)  either intracellularly or extracellularly, depending on the virus involved. 
A)  extracellularly. 
B)  intracellularly. 
C)  both intracellularly and extracellularly. 
D)  either intracellularly or extracellularly, depending on the virus involved.

Question 4

Explain how to determine the number of plaque- forming units in a virus sample.

Accepted Answer

First, several plates containing the hos

Question 5

Restriction is

Accepted Answer

A)  a general host mechanism to prevent the invasion of foreign nucleic acid. 
B)  the viral process whereby the virus prevents other viruses from entering the cell. 
C)  a general host mechanism to prevent virus particles from further infective action. 
D)  the viral process whereby a host's DNA ceases normal functioning. 
A)  a general host mechanism to prevent the invasion of foreign nucleic acid. 
B)  the viral process whereby the virus prevents other viruses from entering the cell. 
C)  a general host mechanism to prevent virus particles from further infective action. 
D)  the viral process whereby a host's DNA ceases normal functioning.

Question 6

The number of infectious plaque forming units (pfu) per volume of fluid is known as the
.

Accepted Answer

The answer of The number of infectious plaque forming units...

Question 7

DNA viruses, along with cells in Archaea, Bacteria, and Eukarya, all follow the central dogma of molecular biology.

Accepted Answer

A) True 
 B)False

Question 8

Transmissible spongiform encephalopathies (TSEs) are caused by_________ .

Accepted Answer

The answer of Transmissible spongiform encephalopathies (TSEs) are caused by_________...

Question 9

The process of copying information found in RNA into DNA is called_________.

Accepted Answer

reverse tr

Question 10

The smallest unit that causes a detectable effect when added to a susceptible host is known as a(n)_________ .

Accepted Answer

virus infe

Question 11

A cell that allows the complete replication cycle of a virus to take place is said to be a(n)_________.

Accepted Answer

The answer of A cell that allows the complete replication...

Question 12

Which T bacteriophage has been studied most extensively?

Accepted Answer

A)  T7 
B)  T6 
C)  T4 
D)  T2 
A)  T7 
B)  T6 
C)  T4 
D)  T2

Question 13

How does efficiency of plating affect plaque- forming units?

Accepted Answer

The issue of plating efficiency is that

Question 14

Describe the process whereby dsDNA viruses are replicated.

Accepted Answer

The asymmetric processing of dsDNA ampli

Question 15

The simplest form of viral reproduction in RNA viruses is that which occurs with the

Accepted Answer

A)  negative- strand RNA viruses. 
B)  positive- strand DNA viruses. 
C)  positive- strand RNA viruses. 
D)  negative- strand DNA viruses. 
A)  negative- strand RNA viruses. 
B)  positive- strand DNA viruses. 
C)  positive- strand RNA viruses. 
D)  negative- strand DNA viruses.

Question 16

Describe the establishment and maintenance of the lysogenic state in the lambda phage.

Accepted Answer

Lambda phage, once circularized by match

Question 17

Bacteriophage Lambda integrates into an E. coli genome by the action of _________.

Accepted Answer

The answer of Bacteriophage Lambda integrates into an E. coli...

Question 18

A virus that kills its host is said to be

Accepted Answer

A)  virulent or lysogenic, but not temperate. 
B)  lysogenic. 
C)  temperate. 
D)  lytic or virulent. 
A)  virulent or lysogenic, but not temperate. 
B)  lysogenic. 
C)  temperate. 
D)  lytic or virulent.

Question 19

A clearing of no host cells among a lawn of growing host cells is known as a(n)_________ , which in principle represents_________ .

Accepted Answer

plaque / o

Question 20

There is at least one known virus whose genome is actually larger than a cellular genome.

Accepted Answer

A) True 
 B)False

Exam 9: Viruses and Virology

Explain the difference between an enveloped virus and a naked virus.

A prophage replicates

Viral replication occurs

Explain how to determine the number of plaque- forming units in a virus sample.

Restriction is

The number of infectious plaque forming units (pfu) per volume of fluid is known as the .

DNA viruses, along with cells in Archaea, Bacteria, and Eukarya, all follow the central dogma of molecular biology.

Transmissible spongiform encephalopathies (TSEs) are caused by_________ .

The process of copying information found in RNA into DNA is called_________.

The smallest unit that causes a detectable effect when added to a susceptible host is known as a(n)_________ .

A cell that allows the complete replication cycle of a virus to take place is said to be a(n)_________.

Which T bacteriophage has been studied most extensively?

How does efficiency of plating affect plaque- forming units?

Describe the process whereby dsDNA viruses are replicated.

The simplest form of viral reproduction in RNA viruses is that which occurs with the

Describe the establishment and maintenance of the lysogenic state in the lambda phage.

Bacteriophage Lambda integrates into an E. coli genome by the action of _________.

A virus that kills its host is said to be

A clearing of no host cells among a lawn of growing host cells is known as a(n)_________ , which in principle represents_________ .

There is at least one known virus whose genome is actually larger than a cellular genome.

Microorganisms and Microbiology

A Brief Journey to the Microbial World

Cell Structure and Function in Bacteria and Archaea

Nutrition, Culture, and Metabolism of Microorganisms

Microbial Growth

Molecular Biology of Bacteria

Archael and Eukaryotic Molecular Biology

Regulation of Gene Expression

Genetics of Bacteria and Arachaea

Genetic Engineering

Microbial Genomics

Phototrophy, Chemolithotrophy, and Major Biosyntheses

Catabolism of Organic Compounds

Commercial Products and Biotechnology

Microbial Evolution and Systematics

Bacteria: the Proteobacteria

Other Bacteria

Archaea

Eukaryotic Cell Biology and Eukaryotic Microorganisms

Viral Diversity

Methods in Microbial Ecology

Major Microbial Habitats and Diversity

Nutrient Cycles, Biodegradation, and Bioremediation

Microbial Symbioses

Microbial Growth Control

Microbial Interactions With Humans

Immunity and Host Defense

Immune Mechanisms

Molecular Immunology

Diagnostic Microbiology and Immunology

Epidemiology

Person-To-Person Microbial Diseases

Vectorborne and Soilborne Microbial Pathogens

Wastewater Treatment, Water Purification, and Waterborne Microbial Diseases

Food Preservation and Foodborne Microbial Diseases

Filters

A clearing of no host cells among a lawn of growing host cells is known as a(n)_ , which in principle represents_ .