TEST BANK
Lehninger Principles of Biochemistry
DAVID NELSON, MICHAEL COX
Eighth Edition
, Test Bank For Lehninger Principles Of
Biochemistry 8th Edition By David L. Nelson;
Michael M. Cox All Chapters 1-28 LATES
A dynamic steady state results when
A) a molecule stops being degraded
B) an organism is at equilibrium with its surroundings
C) there is no net energy transfer
D) the rate of intake or synthesis of a molecule equals the rate
of its disappearance. - ANSWER C
If a chemical reaction starts with 1M concentrations each of reactants
A and B and products C and D, under what conditions of K′eq and
ΔG′° will the reaction proceed in
the forward direction (ΔG′° = RT ln K′eq)?
A) If K′eq is greater than 1 and ΔG′° is negative
B) If K′eq is 0 and ΔG′° is negative
C) If K′eq is negative and ΔG′° is negative
D) If K′eq is less than 1 and ΔG′° is positive. - ANSWER A
Living cells and organisms
A) exchange energy but not matter with their
surroundings.
B) exchange energy and material with their surroundings.
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,C) are closed systems
D) are at equilibrium with their surroundings. - ANSWER
B
The standard free-energy changes of two sequential chemical
reactions are additive only if
A) the reactions share a common intermediate.
B) each reaction has a negative ΔG′°
C) the overall (net) reaction has a postive ΔG′°.
D) the exergonic reaction occurs first. - ANSWER A
Which of the following has a thioester bond?
A) PEP (phosphoenolpyruvate)
B) ATP
C) phosphocreatine
D) acetyl-CoA - ANSWER D
What provides the energy for the synthesis in an RNA polymer?
A) The transfer of an energy-rich ribonucleoside
monophosphate to the polymer.
B) The hydrolysis of two anhydride bonds in
ribonucleoside triphosphates.
C) The transfer of the γ phosphate of a ribonucleoside
triphosphate to the polymer.
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, D) The transfer of an energy-rich ribonucleoside
triphosphate to the polymer. - ANSWER B
When a nucleophile attacks the α phosphorous atom of
ATP, what kind of transfer occurs?
A) pyrophosphoryl transfer
B) phosphoryl transfer
C) adenylyl transfer
D) adenosine transfer - ANSWER C
When dNTPs become depleted in the cell, which of the following
enzymes will regenerate dNTPs from dNDPs?
A) nucleoside diphosphate kinase
B) polyphosphate kinase
C) creatine kinase
D) adenylate kinase - ANSWER A
Which of the following enzymes can catalyze the conversion of AMP
to ADP?
A) nucleoside diphosphate kinase
B) polyphosphate kinase
C) creatine kinase
D) adenylate kinase - ANSWER D
Conversion of NAD+ to NADH is accomplished by the addition of
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Lehninger Principles of Biochemistry
DAVID NELSON, MICHAEL COX
Eighth Edition
, Test Bank For Lehninger Principles Of
Biochemistry 8th Edition By David L. Nelson;
Michael M. Cox All Chapters 1-28 LATES
A dynamic steady state results when
A) a molecule stops being degraded
B) an organism is at equilibrium with its surroundings
C) there is no net energy transfer
D) the rate of intake or synthesis of a molecule equals the rate
of its disappearance. - ANSWER C
If a chemical reaction starts with 1M concentrations each of reactants
A and B and products C and D, under what conditions of K′eq and
ΔG′° will the reaction proceed in
the forward direction (ΔG′° = RT ln K′eq)?
A) If K′eq is greater than 1 and ΔG′° is negative
B) If K′eq is 0 and ΔG′° is negative
C) If K′eq is negative and ΔG′° is negative
D) If K′eq is less than 1 and ΔG′° is positive. - ANSWER A
Living cells and organisms
A) exchange energy but not matter with their
surroundings.
B) exchange energy and material with their surroundings.
1|Page
,C) are closed systems
D) are at equilibrium with their surroundings. - ANSWER
B
The standard free-energy changes of two sequential chemical
reactions are additive only if
A) the reactions share a common intermediate.
B) each reaction has a negative ΔG′°
C) the overall (net) reaction has a postive ΔG′°.
D) the exergonic reaction occurs first. - ANSWER A
Which of the following has a thioester bond?
A) PEP (phosphoenolpyruvate)
B) ATP
C) phosphocreatine
D) acetyl-CoA - ANSWER D
What provides the energy for the synthesis in an RNA polymer?
A) The transfer of an energy-rich ribonucleoside
monophosphate to the polymer.
B) The hydrolysis of two anhydride bonds in
ribonucleoside triphosphates.
C) The transfer of the γ phosphate of a ribonucleoside
triphosphate to the polymer.
2|Page
, D) The transfer of an energy-rich ribonucleoside
triphosphate to the polymer. - ANSWER B
When a nucleophile attacks the α phosphorous atom of
ATP, what kind of transfer occurs?
A) pyrophosphoryl transfer
B) phosphoryl transfer
C) adenylyl transfer
D) adenosine transfer - ANSWER C
When dNTPs become depleted in the cell, which of the following
enzymes will regenerate dNTPs from dNDPs?
A) nucleoside diphosphate kinase
B) polyphosphate kinase
C) creatine kinase
D) adenylate kinase - ANSWER A
Which of the following enzymes can catalyze the conversion of AMP
to ADP?
A) nucleoside diphosphate kinase
B) polyphosphate kinase
C) creatine kinase
D) adenylate kinase - ANSWER D
Conversion of NAD+ to NADH is accomplished by the addition of
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