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Chem 210 Exam 8 Questions And Answers
100% Guaranteed Pass.
T/F the majority of reactions of the urea cycle occur in the cytosol - Answer✔true
T/F NADH yields 1.5 ATP molecules after donating electrons and hydrogen atoms to the
electron transport chain (ETC) - Answer✔false
T/F GTP is invested in the urea cycle - Answer✔false
T/F there are six complexes associated with the ETC - Answer✔false
T/F in the production of ATP via ATP synthase, the H+ ions move from the mitochondrial matrix
to the intermembrane space - Answer✔false
the urea cycle involves ____ reactions (only those in the cyclic portion of the process)
A. 1
B. 2
C. 3
D. 4
E. 5 - Answer✔D. 4
which amino acids are involved in the urea cycle
A. ornithine
B. aspartate
C. threonine
D. both A and B
E. both A and C - Answer✔D. both A and B
fumarate is converted to ___ for it to reenter the mitochondrion
A. ornithine
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B. citrulline
C. malate
D. fumarase
E. ammonia - Answer✔C. malate
urea is useful for excreting nitrogen from cells due to its:
A. ability to form london forces
B. high density of nitrogen atoms
C. large size
D. low melting point
E. both B and C - Answer✔B. high density of nitrogen atoms
____ is both a component of the urea cycle and the citric acid cycle
A. malate
B. acetyl-CoA
C. citrate
D. fumarate
E. none of the above - Answer✔D. fumarate
deamination of an amino acid results in a carbon skeleton and in the production of ____
A. NH2
B. NH
C. NO2
D. NH3
E. NH4+ - Answer✔E. NH4+
FADH2 donates electrons and H+ to complex___
A. I
B. II
C. III
D. IV
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E. V - Answer✔B. II
which of the ETC complexes do pump H+ ions?
A. complex I
B. complex III
C. complex IV
D. all of the above
E. none of the above - Answer✔D. all of the above
what protein shuttles electrons from Complex III to Complex IV?
A. NADH dehydrogenase
B. cytochrome C (CoQ)
C. fumarase
D. cytochrome B
E. none of the above - Answer✔B. cytochrome C (CoQ)
in what portion of the mitochondrion does the CAC take place?
A. matrix
B. intermembrane space
C. inner membrane
D. outer membrane
E. both B and C - Answer✔A. matrix
at which complex does the following reaction take place?
O2 + 4e- + 4H+ -> 2H2O
A. complex I
B. complex II
C. complex III
D. complex IV
E. both A and B - Answer✔D. complex IV
during the electron transport chain, protons are pumped from the ___ in the mitochondria
3|Page
Chem 210 Exam 8 Questions And Answers
100% Guaranteed Pass.
T/F the majority of reactions of the urea cycle occur in the cytosol - Answer✔true
T/F NADH yields 1.5 ATP molecules after donating electrons and hydrogen atoms to the
electron transport chain (ETC) - Answer✔false
T/F GTP is invested in the urea cycle - Answer✔false
T/F there are six complexes associated with the ETC - Answer✔false
T/F in the production of ATP via ATP synthase, the H+ ions move from the mitochondrial matrix
to the intermembrane space - Answer✔false
the urea cycle involves ____ reactions (only those in the cyclic portion of the process)
A. 1
B. 2
C. 3
D. 4
E. 5 - Answer✔D. 4
which amino acids are involved in the urea cycle
A. ornithine
B. aspartate
C. threonine
D. both A and B
E. both A and C - Answer✔D. both A and B
fumarate is converted to ___ for it to reenter the mitochondrion
A. ornithine
1|Page
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B. citrulline
C. malate
D. fumarase
E. ammonia - Answer✔C. malate
urea is useful for excreting nitrogen from cells due to its:
A. ability to form london forces
B. high density of nitrogen atoms
C. large size
D. low melting point
E. both B and C - Answer✔B. high density of nitrogen atoms
____ is both a component of the urea cycle and the citric acid cycle
A. malate
B. acetyl-CoA
C. citrate
D. fumarate
E. none of the above - Answer✔D. fumarate
deamination of an amino acid results in a carbon skeleton and in the production of ____
A. NH2
B. NH
C. NO2
D. NH3
E. NH4+ - Answer✔E. NH4+
FADH2 donates electrons and H+ to complex___
A. I
B. II
C. III
D. IV
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E. V - Answer✔B. II
which of the ETC complexes do pump H+ ions?
A. complex I
B. complex III
C. complex IV
D. all of the above
E. none of the above - Answer✔D. all of the above
what protein shuttles electrons from Complex III to Complex IV?
A. NADH dehydrogenase
B. cytochrome C (CoQ)
C. fumarase
D. cytochrome B
E. none of the above - Answer✔B. cytochrome C (CoQ)
in what portion of the mitochondrion does the CAC take place?
A. matrix
B. intermembrane space
C. inner membrane
D. outer membrane
E. both B and C - Answer✔A. matrix
at which complex does the following reaction take place?
O2 + 4e- + 4H+ -> 2H2O
A. complex I
B. complex II
C. complex III
D. complex IV
E. both A and B - Answer✔D. complex IV
during the electron transport chain, protons are pumped from the ___ in the mitochondria
3|Page
