Which of the following is not nucleophilic?
A) A proton
B) A carbanion
C) An imidazole
D) A hydroxide
E) A carboxylic acid
Give this one a try later!
, A) A proton
The metabolite that regulates the activity of carnitine acyl transferase I is:
A) acetyl-CoA.
B) carnitine-CoA.
C) malonyl-CoA.
D) NADH.
E) CoA.
Give this one a try later!
C) malonyl-CoA.
Pyridoxal phosphate is a cofactor in this class of reactions:
A) acetylation.
B) desulfuration.
C) methylation.
D) reduction.
E) transamination.
Give this one a try later!
E) transamination.
Saturated fatty acids are degraded by the stepwise reactions of oxidation, producing
acetyl-CoA. Under aerobic conditions, how many ATP molecules would be produced
as a consequence of removal of each acetyl-CoA?
,A) 2
B) 3
C) 4
D) 5
E) 6
Give this one a try later!
C) 4
Which of these cofactors participates directly in most of the oxidation-reduction
reactions in the fermentation of glucose to lactate?
A) ADP
B) ATP
C) FAD/FADH2
D) Glyceraldehyde 3-phosphate
E) NAD+/NADH
Give this one a try later!
E) NAD+/NADH
All of the oxidative steps of the citric acid cycle are linked to the reduction of NAD+
except the reaction catalyzed by:
A) isocitrate dehydrogenase.
B) malate dehydrogenase.
C) pyruvate dehydrogenase
D) succinate dehydrogenase.
E) the alpha-ketoglutarate dehydrogenase complex.
, Give this one a try later!
D) succinate dehydrogenase.
For the following reaction, deltaG'° = +29.7 kJ/mol.
L-Malate + NAD+ oxaloacetate + NADH + H+
The reaction as written:
A) can never occur in a cell.
B) can occur in a cell only if it is coupled to another reaction for whichG'° is positive.
C) can occur only in a cell in which NADH is converted to NAD+ by electron
transport.
D) may occur in cells at certain concentrations of substrate and product.
E) would always proceed at a very slow rate
Give this one a try later!
D) may occur in cells at certain concentrations of substrate and product.
Fatty acids are activated to acyl-CoAs and the acyl group is further transferred to
carnitine because:
A) acyl-carnitines readily cross the mitochondrial inner membrane, but acyl-CoAs do
not.
B) acyl-CoAs easily cross the mitochondrial membrane, but the fatty acids themselves
will not.
C) carnitine is required to oxidize NAD+ to NADH.
D) fatty acids cannot be oxidized by FAD unless they are in the acyl-carnitine form.
E) None of the above is true.
Give this one a try later!
A) A proton
B) A carbanion
C) An imidazole
D) A hydroxide
E) A carboxylic acid
Give this one a try later!
, A) A proton
The metabolite that regulates the activity of carnitine acyl transferase I is:
A) acetyl-CoA.
B) carnitine-CoA.
C) malonyl-CoA.
D) NADH.
E) CoA.
Give this one a try later!
C) malonyl-CoA.
Pyridoxal phosphate is a cofactor in this class of reactions:
A) acetylation.
B) desulfuration.
C) methylation.
D) reduction.
E) transamination.
Give this one a try later!
E) transamination.
Saturated fatty acids are degraded by the stepwise reactions of oxidation, producing
acetyl-CoA. Under aerobic conditions, how many ATP molecules would be produced
as a consequence of removal of each acetyl-CoA?
,A) 2
B) 3
C) 4
D) 5
E) 6
Give this one a try later!
C) 4
Which of these cofactors participates directly in most of the oxidation-reduction
reactions in the fermentation of glucose to lactate?
A) ADP
B) ATP
C) FAD/FADH2
D) Glyceraldehyde 3-phosphate
E) NAD+/NADH
Give this one a try later!
E) NAD+/NADH
All of the oxidative steps of the citric acid cycle are linked to the reduction of NAD+
except the reaction catalyzed by:
A) isocitrate dehydrogenase.
B) malate dehydrogenase.
C) pyruvate dehydrogenase
D) succinate dehydrogenase.
E) the alpha-ketoglutarate dehydrogenase complex.
, Give this one a try later!
D) succinate dehydrogenase.
For the following reaction, deltaG'° = +29.7 kJ/mol.
L-Malate + NAD+ oxaloacetate + NADH + H+
The reaction as written:
A) can never occur in a cell.
B) can occur in a cell only if it is coupled to another reaction for whichG'° is positive.
C) can occur only in a cell in which NADH is converted to NAD+ by electron
transport.
D) may occur in cells at certain concentrations of substrate and product.
E) would always proceed at a very slow rate
Give this one a try later!
D) may occur in cells at certain concentrations of substrate and product.
Fatty acids are activated to acyl-CoAs and the acyl group is further transferred to
carnitine because:
A) acyl-carnitines readily cross the mitochondrial inner membrane, but acyl-CoAs do
not.
B) acyl-CoAs easily cross the mitochondrial membrane, but the fatty acids themselves
will not.
C) carnitine is required to oxidize NAD+ to NADH.
D) fatty acids cannot be oxidized by FAD unless they are in the acyl-carnitine form.
E) None of the above is true.
Give this one a try later!
