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Viruses And Bacteria
Test Description: Review questions.
Instructions: Answer all questions to get your test result.
1) Which event listed is most likely to cause a widespread influenza outbreak?
A
The influenza virus is recognized by host immune systems.
B
The northern portion of the country is affected by winter-like weather patterns.
C
Winter precipitation is increased due to global warming.
D
People do not have immunity to a new strain of the influenza virus.
2) How might a disease-causing virus be similar to a computer virus?
A
both can spread easily
B
neither impact humans
C
none of the above
D
neither are dangerous
3) Viruses have a core made up of everything listed here except
A
plasmids
B
RNA
C
genetic material
D
DNA
4) Viruses and bacteria are both microscopic and can both cause disease. Viruses differ from bacteria in that all viruses
A
can be destroyed by antibiotics.
B
cause insect transmitted diseases.
C
have cell walls.
D
need a living host cell to reproduce.
5) Vaccines prevent disease by
A
preparing the immune system to recognize and destroy pathogens.
B
containing specific T lymphocytes.
C
bringing bacteria to infect healthy cells.
D
combining with pathogens to inactivate them.
6) Some viruses are responsible for cancer in humans. This is due to
A
production of viral fluids in the bloodstream.
B
destruction of cells by viral reproduction.
C
stimulation of muscle tone in the heart.
D
fermentation of acids in the digestive system.
7) Some viruses must insert their genetic material into the host cell's DNA. This is accomplished thanks to enzymes. The virus benefits from this action by
A
introducing random deadly mutations into the host cell.
B
acquiring the traits of the host cell.
C
causing the host cell to produce new viruses.
D
changing the host cell into a virus.
8) In which infection cycle does the virus remain dormant?
A
cell cycle
B
protein synthesis
C
lysogenic cycle
D
lytic cycle
9) When a virus invades a host the most common threat is
A
stimulation of muscle tone in the heart.
B
production of viral fluids in the bloodstream.
C
fermentation of acids in the digestive system.
D
destruction of cells by viral reproduction.
10) Some diseases are caused by bacteria, protists, invertebrates or viruses. How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?
A
Bacterial diseases respond to antibiotics, viral diseases do not
B
Both respond to antibiotics
C
Viral diseases respond to antibiotics, bacterial diseases do not.
D
Neither respond to antibiotics
*select an answer for all questions
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