Microbiology Midterm Unit 1

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amoreno7704
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154844
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Microbiology Midterm Unit 1
Updated:
2012-05-20 05:58:16
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Micro unit
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Unit 1
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  1. The idea of Spontaneous Generation postulated that
    a. organisms could evolve into the next generation of organisms.
    b. organisms could spontaneously combust.
    c. organisms could spontaneously arise from other living organisms.
    d. living organisms could spontaneously arise out of nowhere.
    d. living organisms could spontaneously arise out of nowhere.
  2. Organisms
    a. may be classified in five kingdoms.
    b. may be classified in three kingdoms.
    c. probably do not have a common ancestor.
    d. have never shared genes between domains.
    e. b, c and d
    a. may be classified in five kingdoms.
  3. The cell type(s) which lack a membrane bound nucleus are found in the
    a. eukaryotes.
    b. prokaryotes.
    c. fungi
    d. protista.
    e. b and c
    b. prokaryotes.
  4. Which is NOT true of the cytoplasmic membrane?
    a. It defines the boundaries of the cell.
    b. It is selective barrier.
    c. Composed of peptidoglycan.
    d. It uses proteins as selective gates and sensors.
    e. all of the above are true
    c. Composed of peptidoglycan.
  5. The cell wall of Gram-positive bacteria
    a. contains a thin layer of peptidoglycan.
    b. contains a thick layer of peptidoglycan.
    c. is, due to its thickness, an excellent barrier
    d. contains an outer membrane containing lipopolysaccharides
    e. a and d
    b. contains a thick layer of peptidoglycan.
  6. The capsule
    a. may be used for protection.
    b. may be used to help the bacteria survive harsh conditions.
    c. may be involved in movement.
    d. may be involved in energy production
    a. may be used for protection
  7. Phagocytosis
    a. is the ingestion of particles (or cells) by cells.
    b. is the excretion of particles out of bacteria.
    c. is the secretion of proteins.
    d. is the formation of a lysozyme.
    e. b and c
    a. is the ingestion of particles (or cells) by cells.
  8. Bacteria on fish caught in the Arctic Ocean would
    a. be psychrophiles.
    b. be mesophiles.
    c. be anaerobic
    d. not grow very well in the refrigerator.
    e. a and c
    a. be psychrophiles
  9. High concentrations of salt and sugar in foods
    a. are useful in preserving the food.
    b. tend to draw water out of a cell.
    c. tends to force water into a cell.
    d. have no effect on water availability.
    e. a and b
    a. are useful in preserving the food.
  10. Ribosomes are responsible for:
    a. Energy production
    b. Protein synthesis
    c. Replication of genetic material
    d. internal transportation
    e. more than one of the above
    b. Protein synthesis
  11. Bacteria in the genus Mycoplasma do not have a cell wall. Because they do not have a cell wall, they are a lot more susceptible to the environment & harder to grow.
    Mycoplasma bacteria

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