Question 1

Which of the following viruses did D.Ivanovski and M.Beijerinck work with?

Accepted Answer

A) rabies 
B) smallpox 
C) tobacco mosaic virus 
D) herpes 
E) Epstein-Barr virus 
A) rabies 
B) smallpox 
C) tobacco mosaic virus 
D) herpes 
E) Epstein-Barr virus

Question 2

Viruses that infect bacteria are specifically called _____.

Accepted Answer

The answer of Viruses that infect bacteria are specifically called...

Question 3

Which of the following parts of a virus is not always present?

Accepted Answer

A) envelope 
B) nucleic acid 
C) capsid 
D) capsomers 
E) None of the choices are optional parts of a virus. 
A) envelope 
B) nucleic acid 
C) capsid 
D) capsomers 
E) None of the choices are optional parts of a virus.

Question 4

Clostridium botulinum is made virulent by incorporated prophage genes encoding for the botulinum toxin.What term describes this process?

Accepted Answer

A) Lytic phase 
B) Budding 
C) Adsorption 
D) Lysogenic conversion 
E) Latent phase 
A) Lytic phase 
B) Budding 
C) Adsorption 
D) Lysogenic conversion 
E) Latent phase

Question 5

Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called

Accepted Answer

A) lysogeny. 
B) budding. 
C) plaques. 
D) cytopathic effects. 
E) pocks. 
A) lysogeny. 
B) budding. 
C) plaques. 
D) cytopathic effects. 
E) pocks.

Question 6

Virus capsids are made from subunits called

Accepted Answer

A) envelopes. 
B) spikes. 
C) capsomeres. 
D) prophages. 
E) peplomers. 
A) envelopes. 
B) spikes. 
C) capsomeres. 
D) prophages. 
E) peplomers.

Question 7

Host range is limited by

Accepted Answer

A) type of nucleic acid in the virus. 
B) age of the host cell. 
C) type of host cell receptors on cell membrane. 
D) size of the host cell. 
E) All of the choices are correct. 
A) type of nucleic acid in the virus. 
B) age of the host cell. 
C) type of host cell receptors on cell membrane. 
D) size of the host cell. 
E) All of the choices are correct.

Question 8

All of the following is correct about treating viral diseases except

Accepted Answer

A) viruses are killed by the same antibiotics that kill bacteria. 
B) many antiviral drugs block viral replication. 
C) many antiviral drugs cause severe side effects. 
D) interferons show potential for treating and preventing viral infections. 
E) All of the choices are correct. 
A) viruses are killed by the same antibiotics that kill bacteria. 
B) many antiviral drugs block viral replication. 
C) many antiviral drugs cause severe side effects. 
D) interferons show potential for treating and preventing viral infections. 
E) All of the choices are correct.

Question 9

The nucleocapsid consists of

Accepted Answer

A) the capsomers assembled into the capsid. 
B) the nucleic acid of the virus only. 
C) the nucleic acid along with the capsid. 
D) the envelope and capsid. 
E) the envelope, nucleic acid, and capsid. 
A) the capsomers assembled into the capsid. 
B) the nucleic acid of the virus only. 
C) the nucleic acid along with the capsid. 
D) the envelope and capsid. 
E) the envelope, nucleic acid, and capsid.

Question 10

Diagnosis of viral infections sometimes involves analyzing the patient's blood for specific _____ that the immune system produced against the virus.

Accepted Answer

The answer of Diagnosis of viral infections sometimes involves analyzing...

Question 11

When a virus enters a host cell, the viral genes redirect the genetic and metabolic activities of the host cell.

Accepted Answer

A) True 
 B)False

Question 12

Host cells of viruses include

Accepted Answer

A) human and other animals. 
B) plants and fungi. 
C) bacteria. 
D) protozoa and algae. 
E) All of the choices are correct. 
A) human and other animals. 
B) plants and fungi. 
C) bacteria. 
D) protozoa and algae. 
E) All of the choices are correct.

Question 13

During lysogeny, an inactive prophage state occurs when the viral DNA is inserted into the _____ _____.

Accepted Answer

bacterial

Question 14

The core of every virus particle always contains

Accepted Answer

A) DNA. 
B) capsomers. 
C) enzymes. 
D) DNA and RNA. 
E) either DNA or RNA. 
A) DNA. 
B) capsomers. 
C) enzymes. 
D) DNA and RNA. 
E) either DNA or RNA.

Question 15

Viral infections are easier to treat with drugs than bacterial infections.

Accepted Answer

A) True 
 B)False

Question 16

Viruses have all the following except

Accepted Answer

A) definite shape. 
B) metabolism. 
C) genes. 
D) ability to infect host cells. 
E) ultramicroscopic size. 
A) definite shape. 
B) metabolism. 
C) genes. 
D) ability to infect host cells. 
E) ultramicroscopic size.

Question 17

Infectious naked strands of RNA are called

Accepted Answer

A) viroids. 
B) phages. 
C) prions. 
D) oncogenic viruses. 
E) spikes. 
A) viroids. 
B) phages. 
C) prions. 
D) oncogenic viruses. 
E) spikes.

Question 18

Discuss at least six characteristics that are unique to viruses compared to other microorganisms.

Accepted Answer

1. Non-cellular structure: Unlike other

Question 19

Creutzfeld-Jacob disease is

Accepted Answer

A) caused by a chronic latent virus. 
B) initiated by an oncogenic virus. 
C) caused by a viroid. 
D) a spongiform encephalopathy of humans. 
E) also called "mad cow disease". 
A) caused by a chronic latent virus. 
B) initiated by an oncogenic virus. 
C) caused by a viroid. 
D) a spongiform encephalopathy of humans. 
E) also called "mad cow disease".

Question 20

Oncogenic viruses include all the following except

Accepted Answer

A) hepatitis B virus. 
B) measles virus. 
C) papillomavirus. 
D) HTLVI and HTLVII viruses. 
E) Epstein-Barr virus. 
A) hepatitis B virus. 
B) measles virus. 
C) papillomavirus. 
D) HTLVI and HTLVII viruses. 
E) Epstein-Barr virus.

Exam 6: An Introduction to Viruses

Which of the following viruses did D.Ivanovski and M.Beijerinck work with?

Viruses that infect bacteria are specifically called _____.

Which of the following parts of a virus is not always present?

Clostridium botulinum is made virulent by incorporated prophage genes encoding for the botulinum toxin.What term describes this process?

Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called

Virus capsids are made from subunits called

Host range is limited by

All of the following is correct about treating viral diseases except

The nucleocapsid consists of

Diagnosis of viral infections sometimes involves analyzing the patient's blood for specific _____ that the immune system produced against the virus.

When a virus enters a host cell, the viral genes redirect the genetic and metabolic activities of the host cell.

Host cells of viruses include

During lysogeny, an inactive prophage state occurs when the viral DNA is inserted into the _____ _____.

The core of every virus particle always contains

Viral infections are easier to treat with drugs than bacterial infections.

Viruses have all the following except

Infectious naked strands of RNA are called

Discuss at least six characteristics that are unique to viruses compared to other microorganisms.

Creutzfeld-Jacob disease is

Oncogenic viruses include all the following except

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods of Studying Microorganisms

A Survey of Prokaryotic Cells and Microorganisms

A Survey of Eukaryotic Cells and Microorganisms

Microbial Nutrition, Ecology, and Growth

An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering: a Revolution in Molecular Biology

Physical and Chemical Agents for Microbial Control

Drugs, Microbes, Host--The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

An Introduction to Host Defenses and Innate Immunities

Adaptive, Specific Immunity and Immunization

Disorders in Immunity

Procedures for Identifying Pathogens and Diagnosing Infections

The Gram-Positive and Gram-Negative Cocci of Medical Importance

The Gram-Positive Bacilli of Medical Importance

The Gram-Negative Bacilli of Medical Importance

Miscellaneous Bacterial Agents of Disease

The Fungi of Medical Importance

The Parasites of Medical Importance

Introduction to Viruses That Infect Humans: the Dna Viruses

The Rna Viruses That Infect Humans

Environmental Microbiology

Applied and Industrial Microbiology

Filters

During lysogeny, an inactive prophage state occurs when the viral DNA is inserted into the _ _.