6
Student: ___________________________________________________________________________
1. Viruses have all the following except
A. definite shape.
B. metabolism.
C. genes.
D. ability to infect host cells.
E. ultramicroscopic size.
2. Host cells of viruses include
A. human and other animals.
B. plants and fungi.
C. bacteria.
D. protozoa and algae.
E. All of the choices are correct.
3. The core of every virus particle always contains
A. DNA.
B. capsomers.
C. enzymes.
D. DNA and RNA.
E. either DNA or RNA.
4. 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. nucleic acid strand number.
,5. Which of the following represents a virus family name?
A. Herpes simplex virus
B. Herpesviridae
C. Picornavirus
D. Enterovirus
E. Hepatitis B virus
6. Virus capsids are made from subunits called
A. envelopes.
B. spikes.
C. capsomeres.
D. prophages.
E. peplomers.
7. Helical and icosahedral are terms used to describe the shapes of a virus
A. spike.
B. capsomere.
C. envelope.
D. capsid.
E. core.
8. Which of the following is correct about viruses?
A. cannot be seen with a light microscope
B. are procaryotic
C. contain 70S ribosomes
D. undergo binary fission
E. can be grown on nutrient agar
9. All of the following pertain to virus envelopes except they
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.
, 10. Which of the following is not associated with every virus?
A. envelope
B. capsomers
C. capsid
D. nucleic acid
E. genome
11. 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.
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 host DNA and passed on to progeny
D. cause lysis of host cells
E. occur when temperate phages enter host cells
13. T-even phages
A. include the poxviruses.
B. infect Escherichia coli cells.
C. enter host cells by engulfment.
D. have helical capsids.
E. All of the choices are correct.
14. 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, assembly, release.
D. assembly, maturation, replication, release, penetration, adsorption.
E. adsorption, release, maturation, replication, assembly, penetration.
Student: ___________________________________________________________________________
1. Viruses have all the following except
A. definite shape.
B. metabolism.
C. genes.
D. ability to infect host cells.
E. ultramicroscopic size.
2. Host cells of viruses include
A. human and other animals.
B. plants and fungi.
C. bacteria.
D. protozoa and algae.
E. All of the choices are correct.
3. The core of every virus particle always contains
A. DNA.
B. capsomers.
C. enzymes.
D. DNA and RNA.
E. either DNA or RNA.
4. 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. nucleic acid strand number.
,5. Which of the following represents a virus family name?
A. Herpes simplex virus
B. Herpesviridae
C. Picornavirus
D. Enterovirus
E. Hepatitis B virus
6. Virus capsids are made from subunits called
A. envelopes.
B. spikes.
C. capsomeres.
D. prophages.
E. peplomers.
7. Helical and icosahedral are terms used to describe the shapes of a virus
A. spike.
B. capsomere.
C. envelope.
D. capsid.
E. core.
8. Which of the following is correct about viruses?
A. cannot be seen with a light microscope
B. are procaryotic
C. contain 70S ribosomes
D. undergo binary fission
E. can be grown on nutrient agar
9. All of the following pertain to virus envelopes except they
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.
, 10. Which of the following is not associated with every virus?
A. envelope
B. capsomers
C. capsid
D. nucleic acid
E. genome
11. 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.
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 host DNA and passed on to progeny
D. cause lysis of host cells
E. occur when temperate phages enter host cells
13. T-even phages
A. include the poxviruses.
B. infect Escherichia coli cells.
C. enter host cells by engulfment.
D. have helical capsids.
E. All of the choices are correct.
14. 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, assembly, release.
D. assembly, maturation, replication, release, penetration, adsorption.
E. adsorption, release, maturation, replication, assembly, penetration.
