Shared Flashcard Set

Details

Chap 6 HW
Viruses
34
Microbiology
08/01/2010

Additional Microbiology Flashcards

 


 

Cards

Term

1.  Viruses have all the following except:

 

a. definite shape

b. metabolism

c. genes

d. ability to infect host cells

e. ultramicroscopic

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Definition

 

 

 

b.  metabolism

Term

2.  Host cells of viruses include:

 

a.  human and other animals

b.  plants and fungi

c.  bacteria

d.  protzoa

e.  all of the choices are correct

Definition

 

 

 

 

e.  all of the choices are correct

 

Term

3.  The core of every virus particle always contains:

 

a.  DNA

b.  capsomer

c.  enzymes

d.  DNA and RNA

e.  either DNA or RNA

Definition

 

 

 

 

e.  either DNA or RNA

Term

4.  Which of the following represents a virus family name?

 

a.  Herpes simplex virus

b.  Herpesvirdae

c.  Picornavirus

d.  Enterovirus

e.  Hapatitis B virus

 

Definition

 

 

 

b.  Herpesvirdae

 

Term

5.  Classification of viruses into families involves determining all the following characteristics except:

 

a.  type of nucleic acid

b.  type of capsid

c.  presence of an envelope

d.  biochemical reactions

e.  number of strands in the nucleic acid

 

Definition

 

 

 

d.  biochemical reactions

Term

6.  Which of the following is not associated with every virus?

 

a.  envelope

b.  capsomeres

c.  capsid

d.  nucleic acid

e.  genome

Definition

a.  envelope

Term

7.  Helical and icosahedral are terms used to describe the shapes of a virus:

 

a.  spike

b.  capsomere

c.  envelope

d.  capsid

e.  core

Definition

d.  capsid

Term

8.  Viruses:

 

a.  cannot be seen in a light microscope

b.  are prokaryotic

c.  contain 70S ribosomes

d.  undergo binary fission

e.  all of the choices are correct

Definition

a.  cannot be seen in a light microscope

Term

9.  All of the following pertain to virus envelopes except:

 

a.  gained as a virus leaves the host cell membrane

b.  gained as a virus leaves the nuclear membrane

c.  contain special virus proteins

d.  help the virus particle attach to host cells

e.  located between the capsid and nucleic acid

Definition

e.  located between the capsid and nucleic acid

Term

10.  Virus capsids are made from subunits called:

 

a.  envelopes

b.  spikes

c.  capsomeres

d.  prophages

e.  peplomers

Definition

c.  capsomeres

Term

11.  Viruses acquire envelopes around their nucleocapsids during:

 

a.  replication

b.  assembly

c.  adsorption

d.  release

e.  penetration

Definition

d.  release

Term

12.  Which is incorrect about prophages?

 

a.  present when the virus is in lysogeny

b.  formed when viral DNA enters the bacterial     chromosome

c.  replicated with hos DNA and passed on to progeny

d.  cause lysis of host cells

e.  occur when temperate phages enter host cells

Definition

d.  cause lysis of host cells

Term

13.  The correct sequence of events in viral multiplication is

 

a.  penetration, replication, maturation, adsorption, assembly, release

b.  replication, penetration, maturation, assembly, absorption, release

c.  adsorption, penetration, replication, maturation, assemble, release

d.  assembly, maturation, replication, release, penetration, adsorption

e.  adsorption, release, maturation, replication, assembly, penetration

Definition

c.  adsorption, penetration, replication, maturation, assembly, release

Term

14.  The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is:

 

a.  adsorption to the host cells

b.  injection of the viral nucleic acid into the host cell

c.  host cell synthesis of viral enzymes and capsid proteins

d.  assembly of nucleocapsids

e.  replication of viral nucleic acid

Definition

b.  injection of viral nucleic acid into the host cell

Term

15.  These structures are used by bacteriophages to attach to host cell receptors:

 

a.  sheath

b.  tail fibers

c.  nucleic acid

d.  capsid head

e.  none of the choices are correct

Definition

b.  tail fibers

Term

 

 

 

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

Definition

host chromosome

Term

17.  The virus-induced, specific damage to the host cell that can be seen in a light microscope is called:

 

a.  lysogeny

b.  budding

c.  plaques

d.  cytopathic effects

e.  pocks

Definition

c.  plaques

Term

19.  Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called:

 

a.  latent

b.  oncogenic

c.  prions

d.  viroids

e.  delta agents

 

Definition

a.  latent

Term

20.  Which of the following is a type of cytopathic

effect?

 

a.  inclusions in the nucleus

b.  multinucleated giant cells

c.  inclusions in the cytoplasm

d.  cells round up

e.  all of the choices are correct

Definition

e.  all of the choices are correct

Term

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

 

a.  lysogeny

b.  budding

c.  plaques

d.  cytopathic effects

e.  pocks

Definition

c.  plaques

Term

23.  Viruses are ultramicroscopic because they range in size from 2 um to 450 um.      T/F

Definition

False

Term

21.  Host range is limited by:

 

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

Definition

c.  type of host cell receptors on cell membrane

Term

22.  Uncoating of viral nucleic acid:

 

a.  does not occur in bacteriophage multiplication

b.  involves enzymatic destruction of the capsid

c.  occurs during penetration in the multiplication cycle

d.  occurs before replication

e.  all of the choices are correct

Definition

 

 

 

e.  all of the choices are correct

Term
24.  Prophages can be activated into viral replication and entering the lytic cycle.  T/F
Definition

 

 

 

 

True

Term

24.  Spikes are glycoproteins of the virus capsid.

 

a.  True

b.  False

Definition

B.  False 

Term
26.  A specific animal virus has the ability to attach to and enter almost any animal host cell.  T/F
Definition

 

 

 

False

Term
27.  Bacterophages do not undergo adsorption to specific host cell receptors prior to penetration.  T/F
Definition

 

 

 

False

Term
28.  When a virus enters a host cell, the viral genes redirect the genetic and metabolic activities of the host cell.  T/F
Definition

 

 

 

True

 

Term
29.  Viral spikes are inserted into the host cell membrane before budding or exocytosis.  T/F
Definition

 

 

 

 

False

Term
30.  A _____________is the protein shell around the nucleic acid core of a virus.
Definition

 

 

 

 

capsid

Term
31.  Viruses that infect bacteria are specifically called ______________.
Definition

 

 

 

 

phage

Term
32.  Viruses with _______sense RNA contain the correct message for translation, while viruses with __________sense RNA must first be converted into a correct message. 
Definition

 

 

 

 

+ve, -ve

Term
33.  A naked virus does not have an ____________.
Definition

 

 

 

envelope

Term

34.  In general, most DNA viruses multiply in the host cell's ________, whil most RNA viruses multiply in the host cell's ___________.

 

a.  nucleus, cytoplasm

b.  cytoplasm, cell membrane

c.  cell membrane, cytoplasm

d.  cytoplasm, nucleus

e.  nucleus, endoplasmic reticulum

Definition

 

 

 

a.  nucleus, cytoplasm