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None Microbiology Questions

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None Microbiology
Prokaryotes are unlike all other organisms in that their cells                    
  1. lack nuclei.
  2. have organelles.
  3. have cell walls.
  4. lack nucleic acids.
None Microbiology
Bacteria reproduce asexually by                .
  1. binary fission.
  2. spores.
  3. conjugation.
  4. fixation.
None Microbiology
Archaebacteria that live in oxygen-free environments include                .
  1. methanogens.
  2. retroviruses.
  3. bacteriophages.
  4. protists.
None Microbiology
One group of viruses that contain RNA as their genetic information is                   .
  1. oncogenic viruses.
  2. retroviruses.
  3. capsids.
  4. prophages.
None Microbiology
What bacteria, when viewed through a microscope, would appear to be coiled, corkscrew-shaped bacterial cells?
  1. spirilla
  2. flagella
  3. saprophytes
  4. staphylococci
None Microbiology
Rod-shaped bacterial cells are known as                .
  1. spirilla
  2. bacilli
  3. staphylococci
  4. cocci
None Microbiology
Spherical-shaped bacterial cells are known as                .
  1. cocci
  2. bacilli
  3. staphylococci
  4. spirilla
None Microbiology
Disease-causing organisms are known as                .
  1. cocci.
  2. bacilli.
  3. pathogens.
  4. archaebacteria.
None Microbiology
What are pus-forming bacterial cells called that form in long chains and cause blood poisoning?
  1. bacilli
  2. diplococci
  3. streptococci
  4. staphylococci
None Microbiology
Which of these is another term that means the same as germ or bacteria?
  1. microbe
  2. mite
  3. parasite
  4. lice
None Microbiology
Particles made up of nucleic acids, proteins, and in some cases, lipids that can reproduce only by infecting living cells are known as                .
  1. bacteria.
  2. capsids.
  3. prophages.
  4. viruses.
None Microbiology
Which of the following conditions is NOT a disease caused by a virus?
  1. mumps
  2. common cold
  3. tuberculosis
  4. respirator infection
None Microbiology
You have isolated a bacterium that grows in a medium containing an organic substrate and nitrate in the absence of oxygen. The nitrate is reduced to nitrogen gas. You can be sure that this bacterium is                            .
  1. gram positive
  2. using anaerobic respiration
  3. a chemoautotroph
  4. a photoautotroph
  5. a photoheterotroph
None Microbiology
Bacteria that contain chlorophyll "a" belong in the group                 .
  1. archaebacteria.
  2. cyanobacteria.
  3. chemoautotrophs.
  4. pathogens.
None Microbiology
Bacterial cells that may be harmful to the body are called                .
  1. saprophytes
  2. pathogenic
  3. communicable
  4. nonpathogenic
None Microbiology
Which temperature would be most suitable for growing bacteria in industrial conditions?
  1. 25 degrees
  2. 40 degrees
  3. 100 degrees
None Microbiology
Human Immunodeficiency Virus (HIV) can be transferred by all of the following EXCEPT                .
  1. blood
  2. body fluids
  3. semen
  4. holding hands
None Microbiology
What does Acquired Immunodeficiency Syndrome (AIDS) cause the immune system to do?
  1. break down
  2. speed up
  3. work intermittently
  4. continue working properly
None Microbiology
Bacterial cells that are harmless and can even be beneficial to humans are called                       .
  1. viruses
  2. pathogenic bacteria
  3. microbes
  4. nonpathogenic bacteria
None Microbiology
As bacteria absorb food, each cell grows in size and divides, resulting in how many new cells?
  1. six
  2. two
  3. eight
  4. four
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