STRAIGHTERLINE MICROBIOLOGY BIO 250 QUIZ BANK
Select the correct descending taxonomic hierarchy (left to right).
Select one:
a. Family, order,
... [Show More] class
b. Family, genus, species
c. Genus, species, family
d. Class, phylum, order
e. Kingdom, domain, phylum
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Question 2
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The microorganisms that recycle nutrients by breaking down dead matter and wastes are called
.
Select one:
a. decomposers
b. prokaryotes
c. pathogens
d. eukaryotes
e. fermenters
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Question 3
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Question text Polar molecules Select one:
a. have an equal charge distribution.
b. have an unequal charge distribution.
c. are insoluble in water.
d. always contain carbon.
e. always involve oxygen.
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Question 4
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Organic chemicals always have a basic framework of the element bonded to other atoms.
Select one:
a. carbon
b. nitrogen
c. oxygen
d. hydrogen
e. phosphorous
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Question 5
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NASA has published a list of criteria for identifying fossil bacteria in samples from Mars, as part of a search for evidence of life. Which of the following is good evidence for the presence of bacterial cells?
Select one:
a. Cell size of 0.5 to 2 microns
b. Three-dimensional organization of cells in a starburst pattern
c. Absence of carbon in the material
d. No evidence of water in the surrounding mineral
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Question 6
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Mannitol salt agar is selective for organisms in which bacterial genus? Select one:
a. Salmonella
b. Streptococcus
c. Neisseria
d. Staphylococcus
e. Escherichia
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Question 7
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Question text Basic dyes are Select one:
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.
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Question 8
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Which area of biology states that living things undergo gradual structural and functional changes over long periods of time?
Select one:
a. Morphology
b. Phylogeny
c. Evolution
d. Genetics
e. Transformation
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Question 9
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Astrobiology is considered a sub-discipline of microbiology because Select one:
a. life elsewhere in the universe is likely to be microbial.
b. microbes are known to exist on other planets.
c. all extraterrestrials known are microbial.
d. only microbes can reproduce under the extreme conditions in outer space.
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Question 10
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The electrons of an atom are Select one:
a. always equal to the number of protons.
b. used to determine the atomic weight.
c. carrying a positive charge.
d. used to determine the atomic number.
e. always in full orbitals.
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Question 11
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Most biochemical macromolecules are polymers, which are chains of . Select one:
a. hydrophobic molecules
b. electrolytic molecules
c. repeating monomers
d. repeating carbohydrates
e. hydrogen bonds
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Question 12
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Using microbes to detoxify a site contaminated with heavy metals is an example of . Select one:
a. biotechnology
b. bioremediation
c. decomposition
d. immunology
e. epidemiology
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Question 13
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Table 3.6 in your textbook uses Paramecium to illustrate several types of light microscopy. Each image is magnified 230X and measures about 4 cm. The actual size of a Paramecium is about
.
Select one:
a. 175 μm
b. 0.2 μm
c. 4,000 μm
d. 920 μm
e. 57.5 μm
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The correct answer is: 175 μm
Question 14
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What part of a phospholipid comprises the hydrophobic tail? Select one:
a. Fatty acids
b. Glycerol
c. Phosphate
d. Alcohol
e. Hydroxyl
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Question 15
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Select the statement that most accurately reflects the process of plant material digestion in humans.
Select one:
a. It is a very efficient process the produces very little undigested material in feces.
b. It is a process that is dependent upon enzyme (cellulase) production by gut microbiota.
c. It requires the action of enzymes called kinases.
d. It is linked to the digestion of glycogen.
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Question 16
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Bacteria that require special growth factors and complex nutrients are termed . Select one:
a. aerobic
b. anaerobic
d. fermentative
e. hemolytic
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Question 17
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The first cells appeared about billion years ago. Select one:
a. 5
b. 4.5
c. 3.5
d. 2
e. 1
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Question 18
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Thioglycolate medium contains the following: yeast extract, pancreatic digest of casein, glucose, L-cysteine, sodium chloride, sodium thioglycolate, and agar. It is considered a complex medium because
Select one:
a. both yeast extract and pancreatic digest of casein are not chemically defined.
b. it has multiple ingredients for a broad range of nutrients.
c. depending on their oxygen utilization pattern, organisms will grow differently on it.
d. thioglycolate has a carbon-sulfur bond that many microbes cannot break enzymatically.
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Question 19
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Disease-causing microorganisms are called . Select one:
a. decomposers
b. bacteria
d. eukaryotes
e. fermenters
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Question 20
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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.
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The series of tunnel-like membranes functioning in transport and storage are the . Select one:
a. mitochondria
b. lysosomes
c. Golgi apparatus
d. chloroplasts
e. endoplasmic reticulum [Show Less]