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.
,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 vof van venergy-rich
vribonucleoside vmonophosphate vto vthe
vpolymer.
B) The vhydrolysis vof vtwo vanhydride vbonds
vin vribonucleoside vtriphosphates.
C) The vtransfer vof vthe vγ vphosphate vof va vribonucleoside
triphosphate vto vthe vpolymer.
,D) The vtransfer vof van venergy-rich
vribonucleoside vtriphosphate vto vthe vpolymer. v-
vANSWER v v v vB
When va vnucleophile vattacks vthe vα vphosphorous vatom vof
ATP, vwhat vkind vof vtransfer voccurs?
A) pyrophosphoryl vtransfer
B) phosphoryl vtransfer
C) adenylyl vtransfer
D) adenosine vtransfer v- vANSWER v v v vC
When vdNTPs vbecome vdepleted vin vthe vcell, vwhich vof vthe
vfollowing venzymes vwill vregenerate vdNTPs vfrom vdNDPs?
A) nucleoside vdiphosphate vkinase
B) polyphosphate vkinase
C) creatine vkinase
D) adenylate vkinase v- vANSWER v v v vA
Which vof vthe vfollowing venzymes vcan vcatalyze vthe
vconversion vof vAMP vto vADP?
A) nucleoside vdiphosphate vkinase
B) polyphosphate vkinase
C) creatine vkinase
D) adenylate vkinase v- vANSWER v v v vD
Conversion vof vNAD+ vto vNADH vis vaccomplished vby vthe
vaddition vof
, A) a vproton
B) an velectron
C) a vhydride vion
D) a vhydrogen vatom. v- vANSWER v v vvC
Which vof vthe vfollowing vcarbon-containing vmolecules vis
vmost vfully voxidized?
A) carbon vmonoxide
B) carbon vdioxide
C) methane
D) ethanol v- vANSWER v v v vB
The voxidation-reduction vreaction vFe2+ v+ vCu2+ v↔ vFe3+ v+
vCu+, vcan vbe vdescribed vin vterms vof vtwo vhalf-reactions: v(1)
vFe2+ v↔ vFe3+ v+ ve-(2) vCu2+ v+ ve- v↔ vCu+ vWhich vof vthe
vfollowing vstatements vis vtrue?
A) In vthe voverall vreaction vat vthe vtop, vthe vcupric vion
v(Cu2+) vis vthe vreducing vagent.
B) In vhalf-reaction v(2), vcupric vion v(Cu2+) vis vbeing voxidized.
C) In vhalf-reaction v(1), vFe3+ vand ve- vconstitute va
vconjugate vredox vpair.
D) In vthe voverall vreaction vat vthe vtop, vthe vferrous vion
v(Fe2+) vis voxidized vby vthe vcupric vion v(Cu2+). v- vANSWER
v vD
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.
,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 vof van venergy-rich
vribonucleoside vmonophosphate vto vthe
vpolymer.
B) The vhydrolysis vof vtwo vanhydride vbonds
vin vribonucleoside vtriphosphates.
C) The vtransfer vof vthe vγ vphosphate vof va vribonucleoside
triphosphate vto vthe vpolymer.
,D) The vtransfer vof van venergy-rich
vribonucleoside vtriphosphate vto vthe vpolymer. v-
vANSWER v v v vB
When va vnucleophile vattacks vthe vα vphosphorous vatom vof
ATP, vwhat vkind vof vtransfer voccurs?
A) pyrophosphoryl vtransfer
B) phosphoryl vtransfer
C) adenylyl vtransfer
D) adenosine vtransfer v- vANSWER v v v vC
When vdNTPs vbecome vdepleted vin vthe vcell, vwhich vof vthe
vfollowing venzymes vwill vregenerate vdNTPs vfrom vdNDPs?
A) nucleoside vdiphosphate vkinase
B) polyphosphate vkinase
C) creatine vkinase
D) adenylate vkinase v- vANSWER v v v vA
Which vof vthe vfollowing venzymes vcan vcatalyze vthe
vconversion vof vAMP vto vADP?
A) nucleoside vdiphosphate vkinase
B) polyphosphate vkinase
C) creatine vkinase
D) adenylate vkinase v- vANSWER v v v vD
Conversion vof vNAD+ vto vNADH vis vaccomplished vby vthe
vaddition vof
, A) a vproton
B) an velectron
C) a vhydride vion
D) a vhydrogen vatom. v- vANSWER v v vvC
Which vof vthe vfollowing vcarbon-containing vmolecules vis
vmost vfully voxidized?
A) carbon vmonoxide
B) carbon vdioxide
C) methane
D) ethanol v- vANSWER v v v vB
The voxidation-reduction vreaction vFe2+ v+ vCu2+ v↔ vFe3+ v+
vCu+, vcan vbe vdescribed vin vterms vof vtwo vhalf-reactions: v(1)
vFe2+ v↔ vFe3+ v+ ve-(2) vCu2+ v+ ve- v↔ vCu+ vWhich vof vthe
vfollowing vstatements vis vtrue?
A) In vthe voverall vreaction vat vthe vtop, vthe vcupric vion
v(Cu2+) vis vthe vreducing vagent.
B) In vhalf-reaction v(2), vcupric vion v(Cu2+) vis vbeing voxidized.
C) In vhalf-reaction v(1), vFe3+ vand ve- vconstitute va
vconjugate vredox vpair.
D) In vthe voverall vreaction vat vthe vtop, vthe vferrous vion
v(Fe2+) vis voxidized vby vthe vcupric vion v(Cu2+). v- vANSWER
v vD
