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Ninth Grade (Grade 9) Microbiology Questions

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Grade 9 Microbiology
How do viruses reproduce?
  1. sexual reproduction
  2. asexual reproduction
  3. using a host cell's reproductive system
  4. They are not living things, so they do not reproduce.
Grade 9 Microbiology
Prokaryotic cells reproduce by means of
  1. synthesis.
  2. mitosis.
  3. binary fission.
  4. telophase.
Grade 9 Microbiology
Unicellular prokaryotes are found in extreme environments, and their cell walls do not contain peptidoglycans. Which of the following domains is described here?
  1. Bacteria
  2. Archaea
  3. Eukarya
  4. Protista
Grade 9 Microbiology
Which term describes unicellular organisms such as bacteria?
  1. DNA
  2. eukaryote
  3. lysosome
  4. prokaryote
Grade 9 Microbiology
In what way are bacteria harmful?
  1. They recycle nutrients.
  2. They cause disease.
  3. They make food.
Grade 9 Microbiology
What is a nonliving strand of genetic material that has a protein coat?
  1. a virus
  2. an archaea
  3. a eukaryote
  4. a prokaryote
Grade 9 Microbiology
What term is used to describe a spiral-shaped bacteria?
  1. bacillus
  2. coccus
  3. cylinder
  4. spirillum
Grade 9 Microbiology
How does a virus infect a cell?
  1. It moves through the cell.
  2. It forcefully attacks the cell.
  3. It contacts the cell membrane.
  4. Its protein coat tricks the cell into letting it in.
Grade 9 Microbiology
What is a virus?
  1. a bacterial cell
  2. a red blood cell
  3. a white blood cell
  4. an infectious agent
Grade 9 Microbiology
How do viruses reproduce?
  1. They divide by mitosis.
  2. They replicate outside of the host.
  3. They insert their DNA into the host cell.
  4. They do so sexually, by external fertilization.
Grade 9 Microbiology
Why are RNA viruses harder to cure than DNA viruses are?
  1. They are only as hard to cure as DNA viruses are.
  2. They constantly mutate and become immune to vaccines.
  3. They infect a lot of cells rapidly and can constantly reproduce.
  4. They can reproduce indefinitely and multiply in number very quickly.
Grade 9 Microbiology
What are the three kinds of fungi?
  1. sac, club, mildew
  2. slime mold, water mold, mildew
  3. sac, club, imperfect
  4. water mold, sac, mildew
Grade 9 Microbiology
Viruses are structures made up of nucleic acid and an outer                 coat.
  1. bacteria
  2. carbohydrate
  3. protein
  4. protist
Grade 9 Microbiology
In what way are bacteria helpful?
  1. They make food.
  2. They spoil food.
  3. They cause disease.
Grade 9 Microbiology
Bacteria reproduce through
  1. binary fission.
  2. conjugation.
  3. mitosis.
  4. replication.
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
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
Rod-shaped bacteria are called
  1. bacilli.
  2. cocci.
  3. spirilla.
  4. spirochetes.
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
Unicellular prokaryotes that have cell walls with peptidoglycans are called                .
  1. Protists
  2. Archae
  3. Bacteria
  4. Eukarya
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