BIOCHEM MODULE 8 EXAM QUESTIONS
WITH COMPLETE SOLUTIONS
1.5 ATP per FADH2 - correct answer - How many ATP
molecules does FADH2 yield after donating electrons and
hydrogen atoms to the electron transfer chain (ETC)?
2.5 ATP per NADH - correct answer - How many ATP
molecules does NADH yield after donating electrons and
hydrogen atoms to the electron transfer chain (ETC)?
3 - correct answer - How many total ATP are invested in
the urea cycle?
3 - correct answer - Oxidative phosphorylation occurs in
___ phases.
4 - correct answer - How many complexes are
associated with the ETC?
4 - correct answer - The urea cycle involves ___
reactions (only those in the cyclic portion of the process).
, A. The mitochondrion is the main site of oxidative
phosphorylation, which can be attributed to its two-
membrane structure.
- The outer membrane is a bilayer that contains porin
proteins, which allow ions and molecules to cross into the
intermembrane space. The intermembrane space is
located between the inner and outer membrane and
contains solution.
- The inner membrane is also a bilayer but is highly
selective, allowing only select ions and molecules to
cross. This selective characteristic of the inner membrane
is critical for maintaining the specific concentrations of
H+, ATP, and other species within the mitochondrial
matrix.
- The matrix is the innermost space of the mitochondrion
and is where the citric acid cycle as well as parts of beta
oxidation and the urea cycle occur. This close proximity of
reaction cycles is efficient because it allows NADH and
FADH2, produced by the citric acid cycle, to also partici -
correct answer - Describe the critical structure of the
mitochondrion that are important for the production of
ATP.
A. What structural features of the mitochondrion support
ATP formation.
B. Where are the complexes of the ETC located.
WITH COMPLETE SOLUTIONS
1.5 ATP per FADH2 - correct answer - How many ATP
molecules does FADH2 yield after donating electrons and
hydrogen atoms to the electron transfer chain (ETC)?
2.5 ATP per NADH - correct answer - How many ATP
molecules does NADH yield after donating electrons and
hydrogen atoms to the electron transfer chain (ETC)?
3 - correct answer - How many total ATP are invested in
the urea cycle?
3 - correct answer - Oxidative phosphorylation occurs in
___ phases.
4 - correct answer - How many complexes are
associated with the ETC?
4 - correct answer - The urea cycle involves ___
reactions (only those in the cyclic portion of the process).
, A. The mitochondrion is the main site of oxidative
phosphorylation, which can be attributed to its two-
membrane structure.
- The outer membrane is a bilayer that contains porin
proteins, which allow ions and molecules to cross into the
intermembrane space. The intermembrane space is
located between the inner and outer membrane and
contains solution.
- The inner membrane is also a bilayer but is highly
selective, allowing only select ions and molecules to
cross. This selective characteristic of the inner membrane
is critical for maintaining the specific concentrations of
H+, ATP, and other species within the mitochondrial
matrix.
- The matrix is the innermost space of the mitochondrion
and is where the citric acid cycle as well as parts of beta
oxidation and the urea cycle occur. This close proximity of
reaction cycles is efficient because it allows NADH and
FADH2, produced by the citric acid cycle, to also partici -
correct answer - Describe the critical structure of the
mitochondrion that are important for the production of
ATP.
A. What structural features of the mitochondrion support
ATP formation.
B. Where are the complexes of the ETC located.
