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BIOCHEM MODULE 8 EXAM QUESTIONS & ANSWERS
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BIOCHEM MODULE 8 EXAM QUESTIONS & ANSWERS
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BIOCHEM MODULE 8 EXAM QUESTIONS & ANSWERStrue - Answers -T/F: The majority of the reactions of the urea cycle occur in the cytosol.
false - Answers -T/F: The majority of the reactions of the urea cycle occur in the
mitochondrial matrix.
false - Answers -T/F: FADH2 yields 2.5 ATP molecules after donating electrons and
hydrogen atoms to the ETC.
2.5 ATP per NADH - Answers -How many ATP molecules does NADH yield after
donating electrons and hydrogen atoms to the electron transfer chain (ETC)?
1.5 ATP per FADH2 - Answers -How many ATP molecules does FADH2 yield after
donating electrons and hydrogen atoms to the electron transfer chain (ETC)?
true - Answers -T/F: ATP is invested in the urea cycle.
3 - Answers -How many total ATP are invested in the urea cycle?
false - Answers -T/F: There are 5 complexes associated with the ETC.
4 - Answers -How many complexes are associated with the ETC?
false - Answers -T/F: In the production of ATP via ATP synthase, the H+ ions move from
the mitochondrial matrix to the intermembrane space.
true - Answers -T/F: In the production of ATP via ATP synthase, the H+ ions move from
the intermembrane space to the mitochondrial matrix.
4 - Answers -The urea cycle involves ___ reactions (only those in the cyclic portion of
the process).
ornithine, arginine, and aspartate - Answers -What amino acids are involved in the urea
cycle?
malate - Answers -Fumarate reenters the mitochondrion as
ability to hydrogen bonds with water and its high density of nitrogen in a small molecule
- Answers -Urea is useful for excreting nitrogen from cells due to its
fumarate - Answers -Which component of the urea cycle is also a member of the CAC?
NH4+ (amine group) - Answers -Oxidative deamination results in the removal of ___
from amino acids.
, urea - Answers -What is the following chemical species?
ammonium (NH4+) - Answers -What is the following chemical species?
aspartate - Answers -What amino acid is the following structure?
arginine - Answers -What amino acid is the following structure?
ornithine - Answers -What amino acid is the following structure?
complex I - Answers -NADH donates electrons and H+ to complex
complex II - Answers -FADH2 donates electrons and H+ to complex
complexes I, III, IV - Answers -Which of the ETC complexes pump H+?
complex II - Answers -Which of the ETC complexes do not pump H+?
cytochrome c - Answers -What protein shuttles electrons from complex III to complex
IV?
coQ - Answers -What molecule transfers electrons and H+ from both complex I and
complex II to complex III?
matrix - Answers -In what portion of the mitochondrion does the CAC take place?
complex IV - Answers -At which complex does the following reaction take place?
O2 + 4 e- + 4 H+ → 2 H2O
complex I - Answers -At which complex does the following reaction take place?
NADH + H+ + coQ → NAD + coQH2
complex II - Answers -At which complex does the following reaction take place?
FADH2 + coQ → FAD + coQH2
from the matrix to the intermembrane space - Answers -During the electron transport
chain, protons are pumped from ___ in the mitochondria.
as protons flow through ATP synthase and back into the mitochondrial matrix - Answers
-Energy released ___ is utilized for the synthesis of ATP.
F1 - Answers -At which part of ATP synthase is ATP produced?
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