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Biology Chapter 19

Chapter 19 practice - Bacteria and Viruses
 
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Chapter 19 practice - Bacteria and Viruses

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Eubacteria and archaebacteria differ in
a.
the presence of a nucleus.
c.
the presence of a cell wall.
b.
size.
d.
the makeup of their cell walls.
 

 2. 

Which of the following is NOT a way in which archaebacteria and eubacteria differ?
a.
Archaebacteria lack an important carbohydrate found in the cell walls of eubacteria.
b.
The two groups have very different membrane lipids.
c.
Archaebacteria have gene sequences that are similar to those of eukaryotes.
d.
Archaebacteria follow the lytic cycle, while eubacteria follow the lysogenic cycle.
 

 3. 

Which of the following are members of the kingdom Archaebacteria?
a.
methanogens
c.
eukaryotes
b.
eubacteria
d.
E. coli
 

 4. 

Where are you likely to find a photoautotroph?
a.
in your refrigerator
c.
in your digestive system
b.
in the darkness of the ocean
d.
near the surfaces of lakes, streams, and oceans
 

 5. 

A method called Gram staining is used to tell
a.
how a prokaryote obtains energy.
c.
what kind of cell wall a prokaryote has.
b.
whether a prokaryote has flagella.
d.
what shape a prokaryote has.
 
 
nar001-1.jpg

Figure 19–2
 

 6. 

Which cell shape in Figure 19–2 is called a coccus?
a.
A
c.
C
b.
B
d.
none of the above
 

 7. 

Some bacteria are able to survive unfavorable conditions by forming
a.
capsids.
b.
endospores.
c.
photoautotrophs.
d.
coccus.
 

 8. 

Which of the following can survive either with oxygen or without it?
a.
obligate anaerobes
c.
facultative anaerobes
b.
bacteriophages
d.
obligate aerobes
 

 9. 

Which of the following is(are) used to identify prokaryotes?
a.
cell shape
c.
the way prokaryotes move
b.
the way prokaryotes obtain energy
d.
all of the above
 

 10. 

Unlike photoautotrophs, chemoautotrophs obtain energy
a.
directly from the sun.
c.
indirectly from organic molecules.
b.
directly from inorganic molecules.
d.
indirectly from other organisms.
 

 11. 

Which of the following describes a role of bacteria in the environment?
a.
fixing nitrogen
c.
recycling nutrients
b.
carrying out photosynthesis
d.
all of the above
 

 12. 

Bacteria that break down the nutrients in dead matter into simpler substances that are taken up by plant roots are called
a.
photoautotrophs.
b.
flagella.
c.
decomposers.
d.
endospores.
 

 13. 

Bacteria living in extreme environments may be a good source of
a.
antibiotics.
c.
nitrogen-fixing bacteria.
b.
Gram stains.
d.
heat-stable enzymes.
 

 14. 

Humans use bacteria to
a.
clean up small oil spills.
c.
synthesize drugs.
b.
mine minerals from the ground.
d.
all of the above
 

 15. 

Nitrogen fixation involves each of the following EXCEPT
a.
soybeans.
c.
fertilizer.
b.
Rhizobium.
d.
nodules on roots.
 

 16. 

Which of the following structures is not found in bacteria?
a.
nuclear membrane
c.
ribosome
b.
cytoplasm
d.
cell membrane
 

 17. 

Which of the following lacks a nucleus?
a.
a plant cell
b.
an animal cell
c.
an amoeba
d.
a virus
 

 18. 

What is the basic structure of a virus?
a.
a tail sheath surrounded by tail fibers
c.
a capsid surrounded by a protein coat
b.
DNA or RNA surrounded by a protein coat
d.
a tiny cell surrounded by a cell wall
 

 19. 

Which of the following characteristics of living things is NOT true about viruses?
a.
able to reproduce
c.
contain genetic material
b.
obtain and use energy
d.
evolve over time
 

 20. 

The instructions for making new copies of a virus are
a.
a part of a virus’s capsid.
c.
found only in bacteriophages.
b.
coded in surface proteins attached to the protein coat.
d.
coded in either RNA or DNA.
 

 21. 

A viral capsid functions to
a.
force a host cell to make copies of the virus.
b.
transcribe viral genes.
c.
destroy a host cell.
d.
bind the virus to the surface of a host cell.
 

 22. 

The outer protein coat of a virus is called a
a.
tail sheath.
b.
bacteriophage.
c.
capsid.
d.
DNA core.
 

 23. 

All viruses are made of proteins and
a.
nucleic acids.
c.
bacteriophages.
b.
prophages.
d.
endospores.
 

 24. 

Viruses
a.
are all about the same size.
b.
vary greatly in size and structure.
c.
rarely contain DNA or RNA.
d.
can be seen with a basic compound light microscope.
 

 25. 

During a lytic infection, the host cell is
a.
prepared for the lysogenic cycle.
c.
copied many times over.
b.
destroyed.
d.
all of the above
 

 26. 

Unlike lytic viruses, lysogenic viruses do NOT
a.
enter the lytic cycle.
c.
infect host cells.
b.
lyse the host cell right away.
d.
inject their genetic material into the host cell.
 

 27. 

A lytic infection concludes with the
a.
embedding of viral DNA into the host cell’s DNA.
c.
production of a prophage.
b.
production of messenger RNA.
d.
bursting of the host cell.
 

 28. 

Which of the following require a host cell because they are not able to make proteins on their own?
a.
blue-green algae
c.
protozoans
b.
bacteria
d.
viruses
 

 29. 

Food stored in a refrigerator will keep longer because the bacteria that spoil food
a.
die at low temperatures.
b.
take longer to multiply at low temperatures.
c.
require light to live.
d.
grow more slowly in the dark.
 

 30. 

Which of the following is a characteristic of bacteria that is key to keeping them under control?
a.
Most bacteria cannot survive high temperatures for long periods.
b.
Most bacteria are resistant to harmful chemicals.
c.
Most bacteria form endospores when subjected to harsh conditions.
d.
Most bacteria do not cause food to spoil.
 

 31. 

Which of the following will NOT kill bacteria?
a.
refrigeration
c.
chemical disinfection
b.
boiling
d.
frying
 

 32. 

Prions differ from viruses because
a.
prions do not cause disease.
c.
prions only infect plant cells.
b.
prions contain no DNA or RNA.
d.
prions do not contain any protein.
 



 
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