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Ninth Grade (Grade 9) Microbiology Questions

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Grade 9 Microbiology
In what way are bacteria helpful?
  1. They make food.
  2. They spoil food.
  3. They cause disease.
Grade 9 Microbiology
All viruses contain
  1. RNA and a capsid.
  2. DNA and a protein coat.
  3. lipids and a protein coat.
  4. nucleic acids and a protein coat.
Grade 9 Microbiology
How are bacteria cells different from the cells of other organisms?
  1. They do not have flagella.
  2. They do not have a nucleus.
  3. They do not have cytoplasm.
  4. They do not have a cell membrane.
Grade 9 Microbiology
How does a virus reproduce?
  1. It doubles in size and splits in two.
  2. It takes control of another cell.
  3. It mates with another virus.
Grade 9 Microbiology
                are measured in nanometers and are so small they can usually only be seen with the aid of an electron microscope.
  1. Bacteria
  2. Eukaryotes
  3. Prokaryotes
  4. Viruses
Grade 9 Microbiology
Viruses that specialize in the infection of bacteria are
  1. bacteriophages.
  2. bacterioviruses.
  3. retroviruses.
  4. virophages.
Grade 9 Microbiology
E. coli and salmonella are not harmful microorganisms.
  1. True
  2. False
Grade 9 Microbiology
Streptomycin and penicillin are products of helpful microorganisms.
  1. True
  2. False
Grade 9 Microbiology
There are two types of viruses: active viruses and hidden viruses. An active virus reproduces and destroys the cell it attacks. Which describes a hidden virus?
  1. The virus's genetic material takes over the functions of the attacked cell immediately.
  2. The virus attaches to the surface of a bacterium, injects genetic material, takes over cells functions, produces proteins, and destroys the cell.
  3. The genetic material of the virus is injected into the cell's genetic material and becomes a part of the cell's DNA until triggered to reproduce.
  4. The virus survives only in water.
Grade 9 Microbiology
Most eukaryotes are unicellular organisms.
  1. True
  2. False
Grade 9 Microbiology
What is the process by which one strain of bacteria is changed into another?
  1. evolution
  2. mutation
  3. promotion
  4. transformation
Grade 9 Microbiology
Once inside a cell, the virus instructs the cell to produce more viruses. When the cell is full of new viruses, it bursts open and dies.
  1. True
  2. False
Grade 9 Microbiology
What uses conjugation to share genetic material?
  1. viruses
  2. archeae
  3. starfish
  4. bacteria
Grade 9 Microbiology
              Penicillium              is the mold that makes a powerful bacteria-killing antibiotic.
Grade 9 Microbiology
A virus enters the cell, makes copies of itself, and causes the cell to lyse during a                 infection.
  1. bacterial
  2. lysic
  3. lysogenic
  4. lytic
Grade 9 Microbiology
Sweat and skin secretions contain a mixture of molecules that kills or limits the growth of many types of microbes. This action to control microbes is an example of
  1. a nonspecific defense against infection.
  2. an enzyme-catalyzed biochemical reaction.
  3. a specific immune response to infection by microbes.
  4. physically blocking pathogens from entering the body.
Grade 9 Microbiology
Unicellular organisms contain many cells.
  1. True
  2. False
Grade 9 Microbiology
Where do bacteria live?
  1. anywhere
  2. in volcanoes
  3. in salty water
  4. almost anywhere
Grade 9 Microbiology
The smallest living things are single organisms.
  1. True
  2. False
Grade 9 Microbiology
Hidden viruses enter a cell and immediately begin to multiply.
  1. True
  2. False
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