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BICH 411 Final Exam
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Exam of 63 pages for the course BICH 411 Exam 1 at BICH 411 Exam 1 (BICH 411 Final Exam)
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BICH 411 Final ExamObligate aerobes
A) perish under conditions with O2
B) use oxidizing agents such as sulfate or nitrate as a primary food source
C) resemble the earliest life forms
D) all of the above
E) none of the above - ANS-E) none of the above
In catabolic pathways, major nutrients are ______ broken down resulting in the
synthesis of ______.
A) endergonically; ATP
B) exergonically; ADP
C) endergonically; ADP
D) endergonically; NADP+
E) exergonically; ATP - ANS-E) exergonically; ATP
Which of the choices correctly ranks the following compounds from lowest level of
oxidation to highest level of oxidation?
1: CH2=CH2 2: CH3CH0 3: CH3COOH
A) 3<2<1
B) 2<1<3
C) 1<3<2
D) 1<2<3
E) 2<3<1 - ANS-D) 1<2<3
Consider the following metabolic reaction.
Succinyl-CoA + Acetoacetate = Acetoacetyl-CoA + Succinate ∆G°'=1.25 kJ/mol
What is the Keq for this reaction at 25°C?
A) 0.60
B) 1.66
C) 1.00
,D) 4.22 x 10^2
E) 3.21 - ANS-A) 0.60
Consider the same metabolic reaction in problem 4: the ∆G°' for the hydrolysis of
Succinyl-CoA is -33.9 kJ/mol. Determine the ∆G°' for the hydrolysis of Acetoacetyl-CoA
-> Acetoacetate + CoA
A) -32.7 kJ/mol
B) -35.2 kJ/mol
C) +32.7 kJ/mol
D) +35.2 kJ/mol
E) none of the above - ANS-B) -35.2 kJ/mol
The Keq is 1.1 at 25°C for the following reaction. What is the ∆G°' for this reaction?
D-Glucose-6-phosphate -> D-Fructose-6-phosphate
A) +143 J/mol
B) +1.70 kJ/mol
C) -236 J/mol
D) The ∆G°' cannot be determined with the given information
E) The ∆G·' can be determined with the given information but the correct answer is not
shown - ANS-C) -236 J/mol
Consider the following metabolic reaction:
3-Phosphoglycerate -> 2-Phosphoglycerate ∆G°'=+2.20kJ/mol
What is the ∆G' for this reaction when the concentration of 2-phosphoglycerate is
0.290mM and the concentration of 3-phosphoglycerate is 2.90 mM at 37°C?
A) +10.3 kJ/mol
B) -1.53 kJ/mol
C) -3.73 kJ/mol
D) -5.93 kJ/mol
E) -1.30 kJ/mol - ANS-C) -3.73 kJ/mol
Given that the standard reduction potential of oxaloacetate is -0.135 V and the standard
reduction potential of NAD+ is -0.249 V. What is the ∆E°' for the oxidation of malate by
NAD+:
,Malate + NAD+ -> Oxaloacetate + NADH + H+
A) -0.114 V
B) +0.384 V
C) -0.384 V
D) +0.114 V
E) +0.542 V - ANS-A) -0.114 V
ATP contains ______ bonds.
A) one phosphoanhydride and two phosphoester
B) two phosphoester and one glycosidic
C) three phosphoanhydride
D) one phosphoester and two phosphoanhydride
E) one amide and three phosphoanhydride - ANS-D) one phosphoester and two
phosphoanhydride
Which of the following are factors that contribute to the large negative standard free
energy change for the reaction shown below?
ATP -> ADP + Pi
A) the decrease in negative charge repulsion in the products compared to reactants
B) the precipitation of the insoluble Pi
C) the addition of a water molecule to the hydrophilic ATP molecule
D) the increase in resonance stabilization in the reactants compare to the products
E) all of the above - ANS-A) the decrease in negative charge repulsion in the products
compared to reactants
While ______ is always involved in reactions that require the transfer of 2 electrons,
_____ can participate in reactions that transfer either 1 or 2 electrons.
A) O2; NADH+
B) FAD; NAD+
C) NAD+; O2
D) flavin; niacin
E) NAD+; FAD - ANS-E) NAD+; FAD
Which of the following must be regenerated for glycolysis to proceed?
, A) NAD+
B) ATP
C) pyruvate
D) UDP-glucose
E) All of the answers are correct - ANS-A) NAD+
Acyl phosphates such as 1,3-bisphosphoglycerate have a ______ phosphoryl group
transfer potential compared to ATP, which can be recognized by the ______ ∆G°' values
for hydrolysis.
A) greater; more positive
B) lower; more positive
C) greater; more negative
D) lower; more negative
E) none of the above - ANS-C) greater; more negative
Consider the following metabolic reaction important in muscle and nerve cells:
ATP + creatine = phosphocreatine + ADP ∆G°'=12.6 kJ/mol
Under intracellular conditions, the ∆G' for the reaction, which is catalyzed by the
enzyme creatine kinase, is 0 kJ/mol. From this information we can conclude that
A) creatine kinase catalysis would not be necessarily under intracellular conditions
B) ATP has a greater phosphoryl group transfer potential compared to phosphocreatine
C) the reaction operates close to equilibrium in cells
D) at equilibrium, most intracellular creatine is phosphorylated
E) None of the above is a correct conclusion - ANS-C) the reaction operates close to
equilibrium in cells
The terminal electron acceptor in aerobic organisms is
A) CO2
B) O2
C) FAD
D) NAD+
E) H2O - ANS-B) O2
In redox half-reactions, a more positive standard reduction potential means
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