Multiple Choice
Identify the letter of the choice that
best completes the statement or answers the question.
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1.
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Although the terms "bugs" or "germs" are commonly used, they tend
to unduly emphasize: a. | infection and disease | b. | microscopic size | | |
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2.
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Microorganisms are suitable laboratory subjects of study because of they
are: a. | microscopic | b. | fast growing | c. | highly adaptable | d. | comparatively simple | e. | all of these | | |
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3.
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Traditionally, which group of organisms is not usually included in
microbiology? a. | bacteria | b. | protozoans | c. | viruses | d. | plants | e. | fungi | | |
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4.
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Which
of the following is a beneficial activity of microorganisms? a. | Some microorganisms are used as food for
humans. | b. | Some
microorganisms produce oxygen. | c. | Some microorganisms provide nitrogen for plant
growth. | d. | Some
microorganisms are used in sewage treatment processes. | e. | All of these. | | |
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5.
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Which
is the smallest unit of life that can exist as a separate entity? a. | a cell | b. | a molecule | c. | an organ | d. | a population | e. | an ecosystem | | |
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6.
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Which
of the following requirements was necessary for Pasteur to disprove spontaneous
generation? a. | Providing a food
source that would support growth. | b. | Supplying air. | c. | Keeping microorganisms out. | d. | Removing microorganisms that were initially
present. | e. | All of
these. | | |
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7.
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The
least difference between procaryotic and eucaryotic cells lie in: a. | cell membrane | b. | complexity | c. | genome placement | d. | size | e. | all of these | | |
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8.
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Of
significance to beginning microbiology a. | germ theory | b. | lab techniques | c. | scientific method | d. | microscopy | e. | all of these | | |
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9.
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Spontaneous generation is also known as: a. | biogenesis | b. | abiogenesis | | | | |
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10.
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After
two centuries of dispute the vital force of spontaneous generation turned out to
be: a. | airborne microbes | b. | flies | c. | cotton filters | d. | oxygen | e. | all of these | | |
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11.
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For
implicating attending physicians and hospitalization in maternal infections, they were once reviled
by colleagues. a. | O. W. Holmes, I.
Semmelweis | b. | L. Pasteur, R. Koch | | | | |
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12.
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Robert
Koch proved that Bacillus anthracis is responsible for: a. | asepsis | b. | spores | c. | dental caries | d. | sterility | e. | anthrax | | |
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13.
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The
bacterial flagellum consists of : a. | basal body | b. | filament | c. | rod & rings | d. | hook (elbow) | e. | all of these | | |
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14.
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Bacteria of which shape are more likely to be motile?
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15.
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The
microscope preparation most suited for observing live, motile, undistorted microbes is
the: a. | wet mount | b. | gram stain | c. | electron microscope | d. | hanging drop | e. | darkfield microscopy | | |
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16.
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The
flagella of a spirochete winds helically along the cell, occupying the: a. | periplasmic space | b. | cytoplasmic compartment | c. | nucleoid zone | d. | extracellular region | e. | intra-peptidoglycan bridge | | |
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17.
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The
procaryotic cell wall does not occur as: a. | peptidoglycan | b. | the outermost enclosure | c. | susceptible to lysozyme | d. | a single cross-linked molecule | e. | protective against osmotic
pressure | | |
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18.
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The
Gram stain derives its name from: a. | original slides weighing a
gram | b. | the inventor | | | | |
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19.
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Gram-negative bacteria: a. | bind crystal violet | b. | are negatively charged | c. | retain safranin | d. | bind Gram's iodine | e. | all of these | | |
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20.
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Which
cell type envelope is comprised of two cell membranes and a thinner peptidoglycan
layer? a. | gram-positive | b. | gram-negative | | | | |
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21.
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Roomier periplasmic space and endotoxic outer membrane are traits of __
bacteria. a. | gram-positive | b. | gram-negative | | | | |
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22.
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Gram-positive bacteria subjected to lysozyme or penicillin may
become: a. | acid-fast | b. | non-L forms | c. | mycoplasmas | d. | spheroplasts | e. | protoplasts | | |
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23.
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The
bacterial cell membrane is responsible for all of the following except: a. | confers rigidity | b. | regulate material transport | c. | enable absorption &
secretion | d. | create selective
permeability | e. | is energy
metabolic site | | |
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24.
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A
bacterial ribosome is made up of a 30S portion and a 50S part, and when combined the subunits form a
__ whole.
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25.
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Sporulation is apparently initiated mainly by: a. | extreme heat or cold | b. | carbon or nitrogen depletion | c. | extreme crowding | d. | sudden dessication | e. | low mineral availability | | |
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26.
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A
simple spherical shape describes a bacterial cell known as: a. | coccus | b. | vibrio | c. | bacillus | d. | spiralis | e. | there are no such shaped
bacteria | | |
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27.
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Which
of the following pairs is MISMATCHED in reference to bacteria? a. | Metachromatic granules--stored
phosphates | b. | Plasmids--extrachromosomal DNA | c. | Glycocalyx--slime layer | d. | Cell wall--NAM-NAG | e. | Ribosomes--attached to the Endoplasmic
Reticulum | | |
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28.
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An
bacterial chromosome is best described as existing: a. | associated with histone proteins taking the shape of small
rod-like structures | b. | as a single loop of DNA enclosed in a nuclear
membrane | c. | associated with
histone proteins taking the shape of small rod-like structures enclosed in a nuclear
membrane | d. | as a single loop
of double stranded DNA | e. | bacteria DO NOT possess
chromosomes | | |
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29.
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The
term used to describe a disease-causing microorganism is: a. | microbe | b. | bacterium | c. | pathogen | d. | virus | e. | mutant | | |
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30.
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Which
bacterial structure is used for conjugation or genetic transfer? a. | flagella | b. | pili | c. | cell wall | d. | capsule | e. | slime layer | | |
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