Straighterline Microbiology Midterm
Review Questions And Answers With
Verified Solutions 100% Correct Rated
A+
Agar is a complex polysaccharide that comes from a/an ___________.
a. green plant
b. fungus
c. bacterium
d. algae
e. marine invertebrate - ANSWER✔✔ d. algae
Using microbes to detoxify a site contaminated with heavy metals is an example
of _________.
a. biotechnology
b. bioremediation
c. decomposition
d. immunology
e. epidemiology - ANSWER✔✔ b. bioremediation
The three physical forms of laboratory media are _____________.
a. solid, liquid, and gas
,b. solid, semisolid, and liquid
c. a streak plate, a pour plate, and a broth
d. reducing, transport, and enumeration - ANSWER✔✔ b. solid, semisolid, and
liquid
Which of the following is a traditional human use of microorganisms?
a. baking
b. treating water and sewage
c. mass-producing antibiotics
d. cleaning up oil spills - ANSWER✔✔ a. baking bread
Which of the following represents a synthesis reaction?
a. AB --> A + B
b. A + B --> AB
c. AB + XY --> AY +XB
d. AB + XY <--> AY + XB - ANSWER✔✔ b. A + B --> AB
Basic dyes are
a. attracted to the acidic surface of bacterial cells
b. anionic
c. used in negative staining
,d. repelled by cells
e. dyes such as India ink and nigrosin - ANSWER✔✔ a. attracted to the acidic
surface of bacterial cells
The type of microscopy in which you would observe brightly illuminated
specimens against a black background is __________
a. confocal
b. dark-field
c. phase-contrast
d. fluorescence
e. electron - ANSWER✔✔ b. dark-field
A reducing medium is used to culture _________ organisms.
a. fastidious
b. aerobic
c. anaerobic
d. pathogenic - ANSWER✔✔ c. anaerobic
In the cell cytoplasm, molecules of ATP are a ________
a. solute
b. solvent - ANSWER✔✔ a. solute
, A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from the
Last Universal Common Ancestor would show Archaea
a. as the original cells from which the others derived
b. branching off the domain Eukarya
c. branching off of the domain Bacteria - ANSWER✔✔ b. branching off the domain
Eukarya
In the experiments constructed by Pasteur to disprove spontaneous generation,
swan-necked flasks were used. Why was this shape of flask used in this
experiment.
a. the glass neck needed to be open to the air, yet constructed so that bacteria
would settle in the lowest part of the flask
b. these flask shapes were the easiest and cheapest to produce
c. the shape of the glass neck allowed the bacteria into the flask and then into the
media, but air could not enter
d. Because the glass necks were stretched out, the heat used to sterilize the
medium inside of the flask could not kill the bacteria in the neck - ANSWER✔✔ a.
the glass neck needed to be open to the air, yet constructed so that bacteria
would settle in the lowest part of the flask
Atoms that gain or lose electrons become charged particles called____________
a. cations
b. anions
c. ions
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