BIO 250 STRAIGHTERLINE TEST 1 PREP
A classification system based on mutual similarity that involves comparing as
many characteristics as possible is called a __________ system.
Select one:
a. phylogenetic
b. phyletic
c. phenetic
d. determinative systematic - answer-c. phenetic
A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from
the Last Universal Common Ancestor would show Archaea
Select one:
a. as the original cells from which the others derived.
b. branching off the Domain Eukarya.
c. branching off the Domain Bacteria - answer-b. branching off the Domain
Eukarya.
A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from
the Last Universal Common Ancestor would show Archaea
Select one:
a. as the original cells from which the others derived.
b. branching off the Domain Eukarya.
c. branching off the Domain Bacteria. - answer-branching off the Domain
Eukarya.
A microbiologist inoculates Staphylococcus aureus into a culture medium.
Following incubation, both Staphylococcus aureus and Staphylococcus
epidermidis are determined to be growing in this culture. What is the most likely
explanation?
Select one:
a. The microbiologist used too much inoculum.
b. The culture was contaminated.
c. The incubation temperature was incorrect.
d. The culture medium was selective.
e. The culture medium was differential. - answer-b. The culture was
contaminated.
A microbiologist inoculates Staphylococcus aureus into a culture medium.
Following incubation, both Staphylococcus aureus and Staphylococcus
epidermidis are determined to be growing in this culture. What is the most likely
explanation?
Select one:
a. The microbiologist used too much inoculum.
b. The culture was contaminated.
c. The incubation temperature was incorrect.
d. The culture medium was selective.
e. The culture medium was differential. - answer-The culture was contaminated.
A microbiologist must culture a patient's feces for intestinal pathogens. Which of
the following components would likely be present in a selective medium for this
purpose?
Select one:
,a. NaCl
b. Sheep red blood cells
c. Bile salts
d. Thioglycolic acid
e. Peptone - answer-c. Bile salts
A microscope that exposes specimens to ultraviolet, violet, or blue light and
forms an image with the light emitted at a different wavelength is called a
__________
microscope.
Select one:
a. phase-contrast
b. dark-field
c. scanning electron
d. fluorescence - answer-d. fluorescence
A new microbe has been discovered in the rumen of sheep. Microscopy shows no
evidence of a nuclear membrane and biochemical studies of the cell wall
demonstrate the lack of peptidoglycan. Metabolic studies show that this microbe
generates
methane. This microbe would most likely be classified in the:
Select one:
a. Domain Bacteria
b. Domain Archaea
c. Domain Eukarya, Kingdom Fungi
d. Domain Eukarya, Protists - answer-b. Domain Archaea
A nutrient medium that contains at least one ingredient that is not chemically
dened is termed ______.
Select one:
a. complex
b. reducing
c. enriched
d. synthetic - answer-a. complex
A nutrient medium that contains at least one ingredient that is not chemically
defined is termed
a. complex
b. reducing
c. enriched
d. synthetic - answer-a. complex
A nutrient medium that contains at least one ingredient that is not chemically
defined is termed ______.
Select one:
a. complex
b. reducing
c. enriched
d. synthetic - answer-
A nutrient medium that contains at least one ingredient that is not chemically
defined is termed ______.
Select one:
a. complex
, b. reducing
c. enriched
d. synthetic - answer-complex
A nutrient medium that has all of its chemical components identified and their
precise concentrations known and reproducible is termed ______.
Select one:
a. complex
b. reducing
c. enriched
d. defined - answer-d. defined
A pure culture contains
Select one:
a. only one identified species of microorganism.
b. only bacteria.
c. microbes from a single source.
d. a variety of species from the same genus. - answer-only one identified species
of microorganism.
A scanning confocal microscope
Select one:
a. uses ultraviolet light to form a specimen image.
b. scans narrow planes and can build a three-dimensional image of the
specimen.
c. produces specimen images on electron micrographs.
d. uses dyes that emit visible light when excited by ultraviolet radiation. -
answer-b. scans narrow planes and can build a three-dimensional image of the
specimen.
A scientist who studies the influence of microbes in the formation of caves is
called a(n) ______.
Select one:
a. geomicrobiologist
b. astrobiologist
c. epidemiologist
d. immunologist - answer-a. geomicrobiologist
A student is observing microorganisms in a sample of pond water. One organism
of interest has an obvious nucleus, small oval structures containing a green
pigment, and
does not appear to be motile. In which of the following groups would this microbe
most likely be classified?
Select one:
a. Eukaryotes (Fungi)
b. Eukaryotes (Algae)
c. Bacteria
d. Archaea
e. Eukaryotes (Protozoa) - answer-Eukaryotes (Algae)
According to the endosymbiosis hypothesis
Select one:
a. the first endosymbiotic event involved an anaerobic bacterium.
b. the first endosymbiont was a fermentative organism.
A classification system based on mutual similarity that involves comparing as
many characteristics as possible is called a __________ system.
Select one:
a. phylogenetic
b. phyletic
c. phenetic
d. determinative systematic - answer-c. phenetic
A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from
the Last Universal Common Ancestor would show Archaea
Select one:
a. as the original cells from which the others derived.
b. branching off the Domain Eukarya.
c. branching off the Domain Bacteria - answer-b. branching off the Domain
Eukarya.
A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from
the Last Universal Common Ancestor would show Archaea
Select one:
a. as the original cells from which the others derived.
b. branching off the Domain Eukarya.
c. branching off the Domain Bacteria. - answer-branching off the Domain
Eukarya.
A microbiologist inoculates Staphylococcus aureus into a culture medium.
Following incubation, both Staphylococcus aureus and Staphylococcus
epidermidis are determined to be growing in this culture. What is the most likely
explanation?
Select one:
a. The microbiologist used too much inoculum.
b. The culture was contaminated.
c. The incubation temperature was incorrect.
d. The culture medium was selective.
e. The culture medium was differential. - answer-b. The culture was
contaminated.
A microbiologist inoculates Staphylococcus aureus into a culture medium.
Following incubation, both Staphylococcus aureus and Staphylococcus
epidermidis are determined to be growing in this culture. What is the most likely
explanation?
Select one:
a. The microbiologist used too much inoculum.
b. The culture was contaminated.
c. The incubation temperature was incorrect.
d. The culture medium was selective.
e. The culture medium was differential. - answer-The culture was contaminated.
A microbiologist must culture a patient's feces for intestinal pathogens. Which of
the following components would likely be present in a selective medium for this
purpose?
Select one:
,a. NaCl
b. Sheep red blood cells
c. Bile salts
d. Thioglycolic acid
e. Peptone - answer-c. Bile salts
A microscope that exposes specimens to ultraviolet, violet, or blue light and
forms an image with the light emitted at a different wavelength is called a
__________
microscope.
Select one:
a. phase-contrast
b. dark-field
c. scanning electron
d. fluorescence - answer-d. fluorescence
A new microbe has been discovered in the rumen of sheep. Microscopy shows no
evidence of a nuclear membrane and biochemical studies of the cell wall
demonstrate the lack of peptidoglycan. Metabolic studies show that this microbe
generates
methane. This microbe would most likely be classified in the:
Select one:
a. Domain Bacteria
b. Domain Archaea
c. Domain Eukarya, Kingdom Fungi
d. Domain Eukarya, Protists - answer-b. Domain Archaea
A nutrient medium that contains at least one ingredient that is not chemically
dened is termed ______.
Select one:
a. complex
b. reducing
c. enriched
d. synthetic - answer-a. complex
A nutrient medium that contains at least one ingredient that is not chemically
defined is termed
a. complex
b. reducing
c. enriched
d. synthetic - answer-a. complex
A nutrient medium that contains at least one ingredient that is not chemically
defined is termed ______.
Select one:
a. complex
b. reducing
c. enriched
d. synthetic - answer-
A nutrient medium that contains at least one ingredient that is not chemically
defined is termed ______.
Select one:
a. complex
, b. reducing
c. enriched
d. synthetic - answer-complex
A nutrient medium that has all of its chemical components identified and their
precise concentrations known and reproducible is termed ______.
Select one:
a. complex
b. reducing
c. enriched
d. defined - answer-d. defined
A pure culture contains
Select one:
a. only one identified species of microorganism.
b. only bacteria.
c. microbes from a single source.
d. a variety of species from the same genus. - answer-only one identified species
of microorganism.
A scanning confocal microscope
Select one:
a. uses ultraviolet light to form a specimen image.
b. scans narrow planes and can build a three-dimensional image of the
specimen.
c. produces specimen images on electron micrographs.
d. uses dyes that emit visible light when excited by ultraviolet radiation. -
answer-b. scans narrow planes and can build a three-dimensional image of the
specimen.
A scientist who studies the influence of microbes in the formation of caves is
called a(n) ______.
Select one:
a. geomicrobiologist
b. astrobiologist
c. epidemiologist
d. immunologist - answer-a. geomicrobiologist
A student is observing microorganisms in a sample of pond water. One organism
of interest has an obvious nucleus, small oval structures containing a green
pigment, and
does not appear to be motile. In which of the following groups would this microbe
most likely be classified?
Select one:
a. Eukaryotes (Fungi)
b. Eukaryotes (Algae)
c. Bacteria
d. Archaea
e. Eukaryotes (Protozoa) - answer-Eukaryotes (Algae)
According to the endosymbiosis hypothesis
Select one:
a. the first endosymbiotic event involved an anaerobic bacterium.
b. the first endosymbiont was a fermentative organism.
