Bacteria And Viruses Review Question Preview (ID: 49927)
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How do the size of bacteria compare to the size of viruses?
a) Bacteria are smaller than viruses
b) Viruses are smaller than bacteria
c) Bacteria and viruses are roughly the same size
d) Some viruses may be smaller than bacteria, but some may be larger
Which of the following best supports the classification of viruses as non-living?
a) They can reproduce their DNA inside of a host cell.
b) They can mutate or change.
c) They have DNA or RNA.
d) They have no food or energy requirements.
Which of the following describes the way in which a vaccine works?
a) Our immune system launches a response to the harmless form of the virus found in a vaccine, thereby learning to recognize it
b) Vaccines contain the normal virus, but small children's immune systems are developed enough to fight them
c) They kill the virus and the host cell
d) They kill the virus only, and the host cell is able to adapt.
How are bacteria classified?
a) prokaryotes
b) eukaryotes
c) parasites
d) multicellular organisms
Which best explains why bacteria are so biologically successful?
a) They do not require food or energy and they can reproduce using a host cell
b) They can reproduce rapidly and live in extreme environments
c) If they are crystallized, they can still be injected into a cell and survive and they do not require food or energy.
d) They can use their protein coating to hijack a cell and easily replicate their DNA or RNA
Which of the following is NOT a way in which bacteria are identified?
a) Their life stage
b) Their shape
c) Their cell wall
d) Their mode of movement
Which describes the ability of bacteria to break down organisms into their essential chemical elements?
a) Decomposition
b) Nitrogen fixation
c) Pathogens
d) The Nitrogen Cycle
Which describes the most essential role of bacteria in nitrogen fixation?
a) Bacteria are able to convert the nitrogen in the air into usable nitrates in the soil
b) Bacteria can break down nitrogen in the ground and release it back into the air
c) Bacteria contain high amounts of nitrogen which is toxic to humans and other organisms
d) Some bacteria can digest oil, which is helpful in oil spills.
Which of the following best describes how some bacteria can be pathogenic?
a) Some bacteria can release toxins in the body
b) Some bacteria break down nitrogen in the air
c) Some bacteria are used to produce a variety of foods and beverages
d) Some bacteria help dead organisms decompose
Which pathogen can be prokaryotic, eukaryotic, or non-living?
a) parasites
b) bacteria
c) virus
d) lice
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