Bio305 Exam
Anabolic pathways usually involve ____.
Answers:
a. Reduction of Metabolites
b. Release of PPi
c. Production of ATP
d Release of CO2 ANS: a
Diffusion of compounds - e.g. ions, atoms, or molecules - down a gradient is ___ because it ___.
Answers:
a. Endergonic; does not involve bond formation.
b. Exergonic; produces heat.
c. Exergonic; increases entropy.
d. Exergonic; separates like charges ANS: c
_____is a high energy compound because its hydrolysis involves conversion of a thioester with poor pi
overlap into an oxygen ester, which has good pi overlap.
Answers:
a. Pyruvate
b. Acetyl CoA
c. NADH
d. FADH2 ANS: b
,Conversion of NADH to NAD+ is ___ because it ___.
Answers:
a. Exergonic; separates like charges.
b. Exergonic; increases the number of polar bonds.
c. Exergonic; is driven forward by LeChatelier's Principle.
d. Exergonic; increases charge delocalization. ANS: d
A net product of catabolism is
Answers:
a. NADH
b. sugar, e.g. glucose
c. PPi
d. ATP ANS: d
In the absence of O2, glucose is converted to ___ in glycolysis and then __ during fermentation:
Answers:
a. Pyruvate; Acetyl CoA
b. G3P; Acetyl CoA
c. Acetyl CoA; Citric acid
d. Pyruvate; Lactate or ethanol and CO2 ANS: d
Which of the following is an anabolic (anabolism) pathway?
, Answers:
a. Gluconeogenesis
b. Glycolysis
c. Pyruvate Dehydrogenation (PDH)
d. Beta-oxidation of fatty acids ANS: a
A metabolite common to oxidation of both glucose and fatty acids is:
Answers:
a. DHAP
b. Acetyl CoA
c. G3P
d. Pyruvate ANS: b
Reactions in which either CO2 or PPi are produced tend to be very exergonic because:
Answers:
a. Their concentrations quickly decrease, driving the reactions forward due to LeChatelier's Principle.
b. The bond energies of the products are much lower than those of the reactants.
c. Reactions coupled to their production involve reduction of the metabolite.
d. Reactions coupled to their production involve oxidation of the metabolite. ANS: a
In the presence of O2, glucose is converted to ___ during glycolysis and then __ in order to be used in
the Citric Acid Cycle:
Anabolic pathways usually involve ____.
Answers:
a. Reduction of Metabolites
b. Release of PPi
c. Production of ATP
d Release of CO2 ANS: a
Diffusion of compounds - e.g. ions, atoms, or molecules - down a gradient is ___ because it ___.
Answers:
a. Endergonic; does not involve bond formation.
b. Exergonic; produces heat.
c. Exergonic; increases entropy.
d. Exergonic; separates like charges ANS: c
_____is a high energy compound because its hydrolysis involves conversion of a thioester with poor pi
overlap into an oxygen ester, which has good pi overlap.
Answers:
a. Pyruvate
b. Acetyl CoA
c. NADH
d. FADH2 ANS: b
,Conversion of NADH to NAD+ is ___ because it ___.
Answers:
a. Exergonic; separates like charges.
b. Exergonic; increases the number of polar bonds.
c. Exergonic; is driven forward by LeChatelier's Principle.
d. Exergonic; increases charge delocalization. ANS: d
A net product of catabolism is
Answers:
a. NADH
b. sugar, e.g. glucose
c. PPi
d. ATP ANS: d
In the absence of O2, glucose is converted to ___ in glycolysis and then __ during fermentation:
Answers:
a. Pyruvate; Acetyl CoA
b. G3P; Acetyl CoA
c. Acetyl CoA; Citric acid
d. Pyruvate; Lactate or ethanol and CO2 ANS: d
Which of the following is an anabolic (anabolism) pathway?
, Answers:
a. Gluconeogenesis
b. Glycolysis
c. Pyruvate Dehydrogenation (PDH)
d. Beta-oxidation of fatty acids ANS: a
A metabolite common to oxidation of both glucose and fatty acids is:
Answers:
a. DHAP
b. Acetyl CoA
c. G3P
d. Pyruvate ANS: b
Reactions in which either CO2 or PPi are produced tend to be very exergonic because:
Answers:
a. Their concentrations quickly decrease, driving the reactions forward due to LeChatelier's Principle.
b. The bond energies of the products are much lower than those of the reactants.
c. Reactions coupled to their production involve reduction of the metabolite.
d. Reactions coupled to their production involve oxidation of the metabolite. ANS: a
In the presence of O2, glucose is converted to ___ during glycolysis and then __ in order to be used in
the Citric Acid Cycle:
