, Test Bank For Lehninger Principles Of Bioche
’ ’ ’ ’ ’ ’ ’
mistry 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 th
’ ’ ’ ’ ’ ’ ’ ’ ’ ’
e 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 conditio
’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’
ns 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 s ’ ’ ’ ’ ’ ’ ’
urroundings.
B) exchange energy and material with their surroundings. ’ ’ ’ ’ ’ ’
,C) are closed systems ’ ’
D) are at equilibrium with their surroundings. - ANSWER
’ ’ ’ ’ ’ ’ ’
B
‘ ‘ ‘ ‘
The standard free-
’ ’
energy changes of two sequential chemical reactions are addit
’ ’ ’ ’ ’ ’ ’ ’
ive 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 polym
’ ’ ’ ’ ’
er.
B) The hydrolysis of two anhydride bonds in ri
’ ’ ’ ’ ’ ’ ’
bonucleoside triphosphates. ’
C) The transfer of the γ phosphate of a ribonucleoside
’ ’ ’ ’ ’ ’ ’ ’
triphosphate to the polymer. ’ ’ ’
, 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 followi
’ ’ ’ ’ ’ ’ ’ ’ ’ ’
ng 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 o
’ ’ ’ ’ ’ ’ ’ ’ ’ ’
f
’ ’ ’ ’ ’ ’ ’
mistry 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 th
’ ’ ’ ’ ’ ’ ’ ’ ’ ’
e 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 conditio
’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’
ns 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 s ’ ’ ’ ’ ’ ’ ’
urroundings.
B) exchange energy and material with their surroundings. ’ ’ ’ ’ ’ ’
,C) are closed systems ’ ’
D) are at equilibrium with their surroundings. - ANSWER
’ ’ ’ ’ ’ ’ ’
B
‘ ‘ ‘ ‘
The standard free-
’ ’
energy changes of two sequential chemical reactions are addit
’ ’ ’ ’ ’ ’ ’ ’
ive 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 polym
’ ’ ’ ’ ’
er.
B) The hydrolysis of two anhydride bonds in ri
’ ’ ’ ’ ’ ’ ’
bonucleoside triphosphates. ’
C) The transfer of the γ phosphate of a ribonucleoside
’ ’ ’ ’ ’ ’ ’ ’
triphosphate to the polymer. ’ ’ ’
, 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 followi
’ ’ ’ ’ ’ ’ ’ ’ ’ ’
ng 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 o
’ ’ ’ ’ ’ ’ ’ ’ ’ ’
f
