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Ninth Grade (Grade 9) Microbiology Questions

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Grade 9 Microbiology
Spherical-shaped bacteria are called                .
  1. bacilli
  2. cocci
  3. spirilla
  4. spirochetes
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
A unicellular organism has many cells.
  1. True
  2. False
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
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
In what way are bacteria harmful?
  1. They recycle nutrients.
  2. They cause disease.
  3. They make food.
Grade 9 Microbiology
What term is used to describe a spiral-shaped bacteria?
  1. bacillus
  2. coccus
  3. cylinder
  4. spirillum
Grade 9 Microbiology
Viruses are nucleic acids in a protein capsule that attack and take over a cell and reproduce inside the cell. Viruses are much smaller than even a bacterium; they are between 20 and 400 thousandth of a millimeter across. Viruses cannot survive on their own. They are not cells but just a bundle of instructions.
  1. True
  2. False
Grade 9 Microbiology
Which term describes unicellular organisms such as bacteria?
  1. DNA
  2. eukaryote
  3. lysosome
  4. prokaryote
Grade 9 Microbiology
Because E. coli do not keep the crystal violet stain used in Gram staining methods, the organism is known as a                            .
  1. Gram-positive virus
  2. Gram-negative bacteria
  3. Gram-sensitive bacteria
  4. Gram-peptidoglycan bacteria
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
Bacteria reproduce through
  1. binary fission.
  2. conjugation.
  3. mitosis.
  4. replication.
Grade 9 Microbiology
In what way are bacteria and viruses similar?
  1. Bacteria and viruses have nuclei.
  2. Bacteria and viruses destroy cells as they grow.
  3. Bacteria and viruses can be cured with antibiotics.
  4. Bacteria and viruses need a host cell to reproduce.
Grade 9 Microbiology
Bacteria form endospores to survive unfavorable conditions.
  1. True
  2. False
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
Rod-shaped bacteria are called
  1. bacilli.
  2. cocci.
  3. spirilla.
  4. spirochetes.
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
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
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