Question 1

The common species name of the virus is based on the

Accepted Answer

A) presence or absence of a nuclear membrane. 
B) type of nucleic acid it contains. 
C) disease the virus causes. 
D) geographic area it is found.

Question 2

The enveloped viruses typically obtain their envelope

Accepted Answer

A) from the host plasma membrane. 
B) as they exit the host. 
C) from a newly constructed viral-derived membrane. 
D) from the nuclear membrane. 
E) from the host plasma membrane AND as they exit the host.

Question 3

For which of the following processes are enzymes not required?

Accepted Answer

A) Replication 
B) Translation 
C) Maturation 
D) Self-assembly

Question 4

Prions

Accepted Answer

A) consist of a special nucleocapsid. 
B) are made of protein only. 
C) are made of RNA only. 
D) are made of dsRNA and protein.

Question 5

Viruses that cause acute infection result in productive infections.

Accepted Answer

A) True 
 B)False

Question 6

The shape of the virus is determined by its

Accepted Answer

A) nucleic acid. 
B) capsid. 
C) envelope. 
D) tail.

Question 7

An exit method used by viruses that does not immediately destroy the host bacterium is

Accepted Answer

A) lysis. 
B) inversion. 
C) extrusion. 
D) excising.

Question 8

What is a defective phage?

Accepted Answer

A) A virus that has lost some of its genetic material,and therefore cannot infect a new target cell 
B) A virus that has lost some of its genetic material,and therefore cannot replicate within a new target cell 
C) A virus that lacks the ability to replicate independently of its host cell 
D) A virus that cannot attach to its host cell

Question 9

Prions affect the

Accepted Answer

A) respiratory system. 
B) gastrointestinal tract. 
C) nervous system. 
D) lymphatic system.

Question 10

If a virus utilizes a lytic life cycle of reproduction,it will not induce tumors.

Accepted Answer

A) True 
 B)False

Question 11

Cells taken from a tumor

Accepted Answer

A) may be used to grow viruses. 
B) can be cultivated in vitro indefinitely. 
C) may be used to grow bacteriophages. 
D) divide 50 times and then die. 
E) may be used to grow viruses AND can be cultivated in vitro indefinitely.

Question 12

Genetic exchange in segmented viruses that allows a zoonotic virus to infect humans is termed

Accepted Answer

A) antigenic shift. 
B) hemagglutination. 
C) genetic reassortment. 
D) antigenic drift.

Question 13

In the region of budding,the inside of the plasma membrane becomes coated with

Accepted Answer

A) enzymes. 
B) carbohydrates. 
C) steroids. 
D) matrix proteins.

Question 14

Capsids are made of a number of capsomeres that are covalently bonded to one another.

Accepted Answer

A) True 
 B)False

Question 15

Most phages that contain single-stranded DNA

Accepted Answer

A) are extruded. 
B) contain a positive-sense DNA strand. 
C) have their DNA transformed to double-stranded DNA before replication and transcription occur. 
D) All of the choices are correct.

Question 16

One group of animal viruses that are able to agglutinate red blood cells are the

Accepted Answer

A) coronavirus. 
B) retrovirus. 
C) reovirus. 
D) orthomyxovirus.

Question 17

Transducing virulent phages do not lyse the cells they invade because

Accepted Answer

A) transformation is taking place in the phage and this is transferred to the bacterium. 
B) bacterial DNA has replaced critical viral DNA in the phage. 
C) their virulence is dependent on the bacteria and virus replicating together. 
D) the lytic genes are unable to enter during penetration and are shed outside the host.

Question 18

The integration of phage DNA into the bacterial chromosome occurs because of

Accepted Answer

A) the phage's ability to synthesize an enzyme that integrates its DNA into the host's chromosome. 
B) the phage's ability to synthesize enzymes to enter the bacterium. 
C) similar RNA nucleotides in both. 
D) the similarity in enzyme metabolism. 
E) the phage's ability to synthesize enzymes to enter the bacterium AND similar RNA nucleotides in both.

Question 19

The phenomenon responsible for the ability of Corynebacterium diphtherium to produce the virulent toxin responsible for the devastating effects of diphtheria is called

Accepted Answer

A) self-assembly. 
B) matrix conversion. 
C) prion protein. 
D) lysogenic conversion.

Question 20

Virulent as well as temperate phages can serve as generalized transducing phages.

Accepted Answer

A) True 
 B)False

Exam 13: Viruses, Viroids, and Prions

The common species name of the virus is based on the

The enveloped viruses typically obtain their envelope

For which of the following processes are enzymes not required?

Prions

Viruses that cause acute infection result in productive infections.

The shape of the virus is determined by its

An exit method used by viruses that does not immediately destroy the host bacterium is

What is a defective phage?

Prions affect the

If a virus utilizes a lytic life cycle of reproduction,it will not induce tumors.

Cells taken from a tumor

Genetic exchange in segmented viruses that allows a zoonotic virus to infect humans is termed

In the region of budding,the inside of the plasma membrane becomes coated with

Capsids are made of a number of capsomeres that are covalently bonded to one another.

Most phages that contain single-stranded DNA

One group of animal viruses that are able to agglutinate red blood cells are the

Transducing virulent phages do not lyse the cells they invade because

The integration of phage DNA into the bacterial chromosome occurs because of

The phenomenon responsible for the ability of Corynebacterium diphtherium to produce the virulent toxin responsible for the devastating effects of diphtheria is called

Virulent as well as temperate phages can serve as generalized transducing phages.