The steady state assumption, as applied to enzyme kinetics, implies
A) Km = Ks.
B) the enzyme is regulated.
C) the ES complex is formed and broken down at equivalent rates.
D) the Km is equivalent to the cellular substrate concentration.
E) the maximum velocity occurs when the enzyme is saturated.
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, the ES complex is formed and broken down at equivalent rates.
In the binding of oxygen to myoglobin, the relationship between the concentration of
oxygen and the fraction of binding sites occupied can best be described as:
A) hyperbolic.
B) linear with a negative slope.
C) linear with a positive slope.
D) random.
E) sigmoidal.
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hyperbolic.
The benefit of measuring the initial rate of a reaction V0 is that at the beginning of a
reaction:
A) [ES] can be measured accurately.
B) changes in [S] are negligible, so [S] can be treated as a constant.
C) changes in Km are negligible, so Km can be treated as a constant.
D) V0 = Vmax.
E) varying [S] has no effect on V0.
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changes in [S] are negligible, so [S] can be treated as a constant.
The bacterium E. coli requires simple organic molecules for growth and energy—it is
therefore a
,A) chemoautotroph.
B) chemoheterotroph.
C) lithotroph.
D) photoautotroph.
E) photoheterotroph.
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chemo heterotroph.
A small molecule that decreases the activity of an enzyme by binding to a site other
than the catalytic site is termed a(n):
A) allosteric inhibitor.
B) alternative inhibitor.
C) competitive inhibitor.
D) stereospecific agent.
E) transition-state analog.
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allosteric inhibitor.
Energy requiring metabolic pathways that yield complex molecules from simpler
precursors are:
A) amphibolic.
B) anabolic.
C) autotrophic.
D) catabolic.
E) heterotrophic.
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, Anabolic
Starch and glycogen are both polymers of:
A) fructose.
B) glucose1-phosphate.
C) sucrose.
D) alpha-D-glucose.
E) beta-D-glucose.
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ALPHA-D-glucose
Fructose can cyclize to (a)
A: pyranose ring.
B: furanose ring.
C:both pyranose and furanose ring forms.
D: All of the available answers.
E: sucrose.
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both pyranose and furanose ring forms.
Compare the following sequences taken from four different proteins, and select the
answer that best characterizes their relationships
A) Based only on sequences in column B, protein 4 reveals the greatest evolutionary
divergence.
A) Km = Ks.
B) the enzyme is regulated.
C) the ES complex is formed and broken down at equivalent rates.
D) the Km is equivalent to the cellular substrate concentration.
E) the maximum velocity occurs when the enzyme is saturated.
Give this one a try later!
, the ES complex is formed and broken down at equivalent rates.
In the binding of oxygen to myoglobin, the relationship between the concentration of
oxygen and the fraction of binding sites occupied can best be described as:
A) hyperbolic.
B) linear with a negative slope.
C) linear with a positive slope.
D) random.
E) sigmoidal.
Give this one a try later!
hyperbolic.
The benefit of measuring the initial rate of a reaction V0 is that at the beginning of a
reaction:
A) [ES] can be measured accurately.
B) changes in [S] are negligible, so [S] can be treated as a constant.
C) changes in Km are negligible, so Km can be treated as a constant.
D) V0 = Vmax.
E) varying [S] has no effect on V0.
Give this one a try later!
changes in [S] are negligible, so [S] can be treated as a constant.
The bacterium E. coli requires simple organic molecules for growth and energy—it is
therefore a
,A) chemoautotroph.
B) chemoheterotroph.
C) lithotroph.
D) photoautotroph.
E) photoheterotroph.
Give this one a try later!
chemo heterotroph.
A small molecule that decreases the activity of an enzyme by binding to a site other
than the catalytic site is termed a(n):
A) allosteric inhibitor.
B) alternative inhibitor.
C) competitive inhibitor.
D) stereospecific agent.
E) transition-state analog.
Give this one a try later!
allosteric inhibitor.
Energy requiring metabolic pathways that yield complex molecules from simpler
precursors are:
A) amphibolic.
B) anabolic.
C) autotrophic.
D) catabolic.
E) heterotrophic.
Give this one a try later!
, Anabolic
Starch and glycogen are both polymers of:
A) fructose.
B) glucose1-phosphate.
C) sucrose.
D) alpha-D-glucose.
E) beta-D-glucose.
Give this one a try later!
ALPHA-D-glucose
Fructose can cyclize to (a)
A: pyranose ring.
B: furanose ring.
C:both pyranose and furanose ring forms.
D: All of the available answers.
E: sucrose.
Give this one a try later!
both pyranose and furanose ring forms.
Compare the following sequences taken from four different proteins, and select the
answer that best characterizes their relationships
A) Based only on sequences in column B, protein 4 reveals the greatest evolutionary
divergence.
