UNE Biochemistry Midterm Study Bank-Verified
Questions And Answers
Succinate is a substrate for which complex in the electron transport chain?
a.) Complex 1 (NADH-1 oxidoreductase)
b.) Complex IV (Cyt c oxidase)
c.) Complex V (ATP synthase)
d.) complex II (Succinate-Q reductase) ~CORRECT ANSWER~✓✓Complex
II (succinate-Q reductase) (D)
Which of the following would be consistent with an exergonic reaction?
a.) ∆S would be negative
b.) ∆G would be negative
c.) ∆S would be positive
,d.)∆G would be positive ~CORRECT ANSWER~✓✓∆G would be negative
(B)
Which of the following describes the malate-aspartate shuttle system?
a.) Carries NADH from the cytoplasm directly into the mitochondria
b.) Generates 2.5 molecules of ATP in mitochondria per each NADH from
glycolysis
c.) Moves NADH from the mitochondria to the cytoplasm
d.) Relies on malate dehydrogenase in the inner mitochondrial membrane
e.) Requires reduction of pyruvate to lactate for oxidizing NADH
~CORRECT ANSWER~✓✓Generates 2.5 molecules of ATP in mitochondria
per each NADH from glycolysis (B)
ATP is a high energy molecule that is often hydrolyzed during reactions.
The energy within ATP is stored primarily in which of the following
components of the molecule?
,a.) In the high energy phosphate bonds
b.) In the adenine base
c.) In the D-ribose group ~CORRECT ANSWER~✓✓In the high energy
phosphate bonds (A)
Dinitrophenol is an uncoupler of the electron transport chain. The addition
of dinitrophenol will have which of the following impacts?
a.) Decrease the pH of the intermembrane space
b.) Increase oxygen consumption
c.) Decrease oxidation of NADH
d.) Increase ATP production ~CORRECT ANSWER~✓✓Increase oxygen
consumption (B)
In the malate aspartate shuttle, glutamate is converted to _______ in the
mitochondria while aspartate is converted to _______ in the cytosol.
, a.) Oxaloacetate; malate
b.) alpha-ketoglutarate; oxaloacetate
c.) Oxaloacetate; glutamate
d.) Aspartate; alpha-ketoglutarate
e.) Malate; oxaloacetate ~CORRECT ANSWER~✓✓alpha-ketoglutarate;
oxaloacetate (B)
The glycerophosphate shuttle is a major shuttle of most tissues. Which of
the following best describes the transfer of electrons by this shuttle?
a.) Electrons are directly transferred from glycerol-3-phosphate to NAD
containing glycerol phosphate dehydrogenase
b.) Electrons are directly transferred from glycerol-3-phosphate to an FAD
containing glycerol phosphate dehydrogenase
c.) Electrons are directly transferred from DHAP (dihydroxyacetone
phosphate) to an FAD containing glycerol phosphate dehydrogenase
Questions And Answers
Succinate is a substrate for which complex in the electron transport chain?
a.) Complex 1 (NADH-1 oxidoreductase)
b.) Complex IV (Cyt c oxidase)
c.) Complex V (ATP synthase)
d.) complex II (Succinate-Q reductase) ~CORRECT ANSWER~✓✓Complex
II (succinate-Q reductase) (D)
Which of the following would be consistent with an exergonic reaction?
a.) ∆S would be negative
b.) ∆G would be negative
c.) ∆S would be positive
,d.)∆G would be positive ~CORRECT ANSWER~✓✓∆G would be negative
(B)
Which of the following describes the malate-aspartate shuttle system?
a.) Carries NADH from the cytoplasm directly into the mitochondria
b.) Generates 2.5 molecules of ATP in mitochondria per each NADH from
glycolysis
c.) Moves NADH from the mitochondria to the cytoplasm
d.) Relies on malate dehydrogenase in the inner mitochondrial membrane
e.) Requires reduction of pyruvate to lactate for oxidizing NADH
~CORRECT ANSWER~✓✓Generates 2.5 molecules of ATP in mitochondria
per each NADH from glycolysis (B)
ATP is a high energy molecule that is often hydrolyzed during reactions.
The energy within ATP is stored primarily in which of the following
components of the molecule?
,a.) In the high energy phosphate bonds
b.) In the adenine base
c.) In the D-ribose group ~CORRECT ANSWER~✓✓In the high energy
phosphate bonds (A)
Dinitrophenol is an uncoupler of the electron transport chain. The addition
of dinitrophenol will have which of the following impacts?
a.) Decrease the pH of the intermembrane space
b.) Increase oxygen consumption
c.) Decrease oxidation of NADH
d.) Increase ATP production ~CORRECT ANSWER~✓✓Increase oxygen
consumption (B)
In the malate aspartate shuttle, glutamate is converted to _______ in the
mitochondria while aspartate is converted to _______ in the cytosol.
, a.) Oxaloacetate; malate
b.) alpha-ketoglutarate; oxaloacetate
c.) Oxaloacetate; glutamate
d.) Aspartate; alpha-ketoglutarate
e.) Malate; oxaloacetate ~CORRECT ANSWER~✓✓alpha-ketoglutarate;
oxaloacetate (B)
The glycerophosphate shuttle is a major shuttle of most tissues. Which of
the following best describes the transfer of electrons by this shuttle?
a.) Electrons are directly transferred from glycerol-3-phosphate to NAD
containing glycerol phosphate dehydrogenase
b.) Electrons are directly transferred from glycerol-3-phosphate to an FAD
containing glycerol phosphate dehydrogenase
c.) Electrons are directly transferred from DHAP (dihydroxyacetone
phosphate) to an FAD containing glycerol phosphate dehydrogenase
