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BIO 230 Exam 1 Practice Test Questions
1) Catabolic reactions are generally degradative and hydrolytic.
True or False? - correct answer-TRUE
1) Infectious disease is almost totally eradicated in our world.
True or False? - correct answer-FALSE
1) Microorganisms are involved in each of the following processes EXCEPT
A) infection.
B) decomposition of organic material.
C) O2 production.
D) food production.
E) smog production. - correct answer-E - smog production
1) The cell walls of bacteria are responsible for the shape of the bacteria and the difference
in the Gram stain reaction.
True or False? - correct answer-TRUE
1) The counterstain used in the Gram stain is a basic dye.
True or False? - correct answer-TRUE
1) Which of the following compounds is NOT an enzyme?
A) dehydrogenase B) cellulase C) coenzyme A D) -galactosidase E) sucrase - correct
answer-C) coenzyme A
1) Which of the following is NOT equal to 1 mm?
A) 0.001 m
B) 106 nm
C) 0.1 cm
D) 100 m
E) 10-3 m - correct answer-D) 100 m
1) Which of the following statements is INCORRECT regarding prokaryotic cells?
A) Their DNA is not enclosed within a membrane. B) They lack membrane-enclosed
organelles. C) They typically have a circular chromosome. D) They reproduce by binary
fission. E) They lack a plasma membrane. - correct answer-E) They lack a plasma
membrane.
,10) Figure 1.1 The bacterial shape of the cells in the scanning electron micrograph shown in
Figure 1.1 would best be described as
A) bacillus. B) spiral. C) coccus. D) ovoid. E) columnar. - correct answer-A) bacillus.
10) Figure 5.5
Which of the graphs in Figure 5.5 best illustrates the activity of an enzyme that is saturated
with substrate?
A) a
B) b
C) c
D) d
E) e - correct answer-C) c
10) If you observe rod-shaped red cells after the Gram stain, you can assume their cell walls
contain endotoxin.
True or False? - correct answer-TRUE
10) Once an enzyme has converted substrates into products, the active site reverts back to
its original form.
True or False? - correct answer-TRUE
10) Scanned probe microscopy is used to examine fine detail of molecular complexes, such
as blood clots, or molecules, such as DNA.
True or False? - correct answer-TRUE
10) Simple staining is often necessary to improve contrast in which microscope?
A) compound light microscope
B) phase-contrast microscope
C) darkfield microscope
D) fluorescence microscope
E) electron microscope - correct answer-A) compound light microscope
10) Which of the following organelles most closely resembles a prokaryotic cell?
A) nucleus
B) mitochondrion C) Golgi complex D) vacuole E) cell wall - correct answer-B) mitochondrion
11) Protozoan motility structures include
, A) cilia. B) flagella. C) pseudopods. D) cilia and pseudopods only. E) cilia, flagella, and
pseudopods. - correct answer-E) cilia, flagella, and pseudopods.
11) Which microscope is used to see internal structures of cells in a natural state?
A) compound light microscope
B) phase-contrast microscope
C) darkfield microscope
D) fluorescence microscope
E) electron microscope - correct answer-B) phase-contrast microscope
11) Which of the following is the best definition of oxidative phosphorylation?
A) Electrons are passed through a series of carriers to O2.
B) A proton gradient allows hydrogen ions to flow back into the cells through transmembrane
protein channels, releasing energy that is used to generate ATP.
C) ATP is directly transferred from a substrate to ADP.
D) Electrons are passed through a series of carriers to an organic compound. - correct
answer-B) A proton gradient allows hydrogen ions to flow back into the cells through
transmembrane protein channels, releasing energy that is used to generate ATP.
12) Viruses are not considered living organisms because they
A) cannot reproduce by themselves. B) are structurally very simple. C) can only be
visualized using an electron microscope. D) are typically associated with disease. E) are
ubiquitous in nature. - correct answer-A) cannot reproduce by themselves.
12) Which drawing in Figure 4.1 possesses an axial filament?
A) a B) b C) c D) d E) e - correct answer-A) a
12) Which microscope uses visible light?
A) confocal microscope
B) differential interference contrast microscope
C) fluorescence microscope
D) scanning acoustic microscope
E) scanning electron microscope - correct answer-B) differential interference contrast
microscope
12) Which of the following statements about substrate-level phosphorylation is FALSE?
A) It involves the direct transfer of a high-energy phosphate group from an intermediate
metabolic compound to ADP. B) No final electron acceptor is required. C) It occurs in
glycolysis. D) The oxidation of intermediate metabolic compounds releases energy that is
used to generate ATP. E) It occurs to a lesser degree in the Krebs cycle than in glycolysis. -
correct answer-D) The oxidation of intermediate metabolic compounds releases energy that
is used to generate ATP.
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