Question 1
Correct
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The incidence of deaths from communicable disease is in the United States
compared to the entire
... [Show More] world.
Select one:
a. less
b. greater
c. about the same
Question 2
Correct
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Using microbes to detoxify a site contaminated with heavy metals is an example of
.
Select one:
a. immunology
b. bioremediation
c. epidemiology
d. decomposition
e. biotechnology
Straighterline BIO250 Microbiology Graded Exam 1 (New Version June 2024)
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Grade 120.83 out of 125.00 (97%)Question 4
Correct
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of 4.17
Which area of biology states that living things undergo gradual structural and functional
changes over long periods of time?
Select one:
a. Morphology
b. Evolution
c. Transformation
d. Genetics
e. Phylogeny
Question 5
Incorrect
0.00 points out
of 4.17
The first cells appeared about billion years ago.
Select one:
a. 2
b. 4
c. 3.5
d. 5
e. 1
The scientific method includes all of the following except .
Select one:
a. publication
b. observation
c. experimentation
d. hypothesis
Question 3
Correct
4.17 points out
of 4.17Question 7
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The orderly arrangement of organisms into a hierarchy of taxa is called .
Select one:
a. identification
b. classification
c. biotechnology
d. experimentation
e. nomenclature
Question 8
Correct
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Astrobiology is considered a sub-discipline of microbiology because .
Select one:
a. microbes are known to exist on other planets
b. all extraterrestrials known are microbial
c. only microbes can reproduce under the extreme conditions in outer space
d. life elsewhere in the universe is likely to be microbial
Which scientific name is written correctly?
Select one:
a. Staphylococcus aureus
b. staphylococcus aureus
c. Staphylococcusaureus
d. S. aureus
e. Staphylococcus aureus
Question 6
Correct
4.17 points out
of 4.17Question 10
Correct
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Analysis of the small subunit rRNAs from all organisms in the three current domains
suggests that .
Select one:
a. bacteria, archaea, and eukaryotes are not related
b. the Archaea are more closely related to bacteria than eukaryotes
c. all modern and extinct organisms on earth arose from a common ancestor
d. the eukaryotes arose from prokaryotes
Question 11
Correct
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All cells contain .
Select one:
a. uracil in their DNA
b. cell walls made of cellulose
c. mitochondria to generate ATP
d. ribosomes for protein synthesis
e. organelles for compartmentalization
Koch's postulates are criteria used to establish that .
Select one:
a. a specific microbe should be classified in a specific kingdom
b. microbes can be used to clean up toxic spills
c. life forms can only arise from preexisting life forms
d. microbes are found on dust particles
e. a specific microbe is the cause of a specific disease
Question 9
Correct
4.17 points out
of 4.17Question 13
Correct
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Substances that release ions when dissolved in water and conduct electricity are .
Select one:
a. electrolytes
b. covalent
c. nonpolar
d. solvents
e. electrons
Question 14
Correct
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The valence number is the .
Select one:
a. number of electrons in the innermost orbital
b. number of electrons in the outermost orbital
c. atomic weight
d. number of neutrons
e. number of protons
The building blocks of an enzyme are .
Select one:
a. phosphate, glycerol, and fatty acids
b. glycerol and fatty acids
c. nucleotides
d. monosaccharides
e. amino acids
Question 12
Correct
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of 4.17Question 16
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The simple microscopes used by the earliest practitioners of microscopy contained which
of the following?
Select one:
a. Oil-immersion lens
b. Magnifying lens
c. Lamp
d. Ocular
e. Condenser
Question 17
Correct
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of 4.17
All of the following are examples of different types of microbiological media except
.
Select one:
a. enriched
b. agar
c. broth
d. semisolid
e. Petri dish
A textbook uses Paramecium to illustrate several types of light microscopy.Each image is
magnified 230Xand measures about 4 cm. The actual size of a Paramecium is about
.
Select one:
a. 0.2μm
b. 4,000μm
c. 920μm
d. 57.5μm
e. 175 μm
Question 15
Correct
4.17 points out
of 4.17Question 19
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The division of microbes termed the Mendosicuteshave a cell wall type best described as
.
Select one:
a. gram-negative
b. archaeal
c. gram-positive
d. lacking a cell wall
Question 20
Correct
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The term that refers to the presence of flagella all over the cell surface is .
Select one:
a. amphitrichous
b. atrichous
c. peritrichous
d. monotrichous
e. lophotrichous
Which method often results in colonies developing down throughout the agar along with
some colonies on the surface?
Select one:
a. Spread plate
b. Streak plate
c. Pour plate
d. Replica plate
Question 18
Correct
4.17 points out
of 4.17Question 22
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Lysozyme is most effective against .
Select one:
a. archaea
b. gram-negative organisms
c. gram-positive organisms
d. cyanobacteria
e. mycoplasmas
Question 23
Correct
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of 4.17
All of the following are helminths except .
Select one:
a. tapeworms
b. flukes
c. trypanosomes
d. pinworms
e. roundworms
A clinical laboratory that identifies the bacterial agents that cause human disease would
refer to Bergey's Manual of Bacteriology for guidance in identification.
Select one:
a. Classical
b. Systematic
c. Determinative
d. Evolutionary
Question 21
Correct
4.17 points out
of 4.17Question 25
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Viral tissue specificities are called .
Select one:
a. virions
b. uncoating
c. receptacles
d. ranges
e. tropisms
Question 26
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The primary purpose(s) of viral cultivation is/are to .
Select one:
a. prepare viruses for vaccines
b. isolate and identify viruses in clinical specimens
c. do detailed research on viral structure, lifestyle, genetics, and effects on host cells
d. perform wide-scale harvesting of viruses
e. All of thechoices are correct.
In humans, helminths generally infect the .
Select one:
a. skin
b. muscular system
c. gastrointestinal tract
d. urinary tract
e. nervous system
Question 24
Correct
4.17 points out
of 4.17Question 28
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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. Sheep red blood cells
b. Peptone
c. Thioglycolic acid
d. Bile salts
e. NaCl
Question 29
Correct
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A reducing medium is used to culture organisms.
Select one:
a. aerobic
b. fastidious
c. anaerobic
d. pathogenic
Two noncellular agents, smaller than viruses, are infectious proteins called and
infectious RNA strands called .
Select one:
a. viroids;phages
b. prions;viroids
c. virions;prions
d. prions;capsomeres
e. prions;phages
Question 27
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A reducing medium contains .
Select one:
a. extra oxygen
b. inhibiting agents
c. sugars that can be fermented
d. substances that remove oxygen
e. hemoglobin, vitamins, or other growth factors
Question 30
Correct
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