Portage Learning CHEM 210 Biochemistry
Biochem Module 8 Exam 50 QUESTIONS AND
CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS) ALREADY
GRADED A+ 2025 NEW UPDATE
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.
ability to hydrogen bonds with water and its high density of nitrogen in a small molecule
- CORRECT ANSWER: Urea is useful for excreting nitrogen from cells due to its
After the first phase, the chemical reactions of the ETC provide energy from NADH and
FADH2 to pump H+ ions from the mitochondrial matrix into the inter membrane space.
These reactions also provide electrons and H+ to convert oxygen into water. Together,
these reactions create a H+ gradient that allows H+ to flow through and rotate the ATP
synthase in order to produce ATP. - CORRECT ANSWER: Oxidative phosphorylation
occurs in 3 phases. The first phase is the flow of electrons from NADH and FADH2.
What happens after this first phase is complete?
ammonium (NH4+) - CORRECT ANSWER: What is the following chemical species?
arginine - CORRECT ANSWER: What amino acid is the following structure?
as protons flow through ATP synthase and back into the mitochondrial matrix -
CORRECT ANSWER: Energy released ___ is utilized for the synthesis of ATP.
aspartate - CORRECT ANSWER: What amino acid is the following structure?
Biochem Module 8 Exam 50 QUESTIONS AND
CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS) ALREADY
GRADED A+ 2025 NEW UPDATE
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.
ability to hydrogen bonds with water and its high density of nitrogen in a small molecule
- CORRECT ANSWER: Urea is useful for excreting nitrogen from cells due to its
After the first phase, the chemical reactions of the ETC provide energy from NADH and
FADH2 to pump H+ ions from the mitochondrial matrix into the inter membrane space.
These reactions also provide electrons and H+ to convert oxygen into water. Together,
these reactions create a H+ gradient that allows H+ to flow through and rotate the ATP
synthase in order to produce ATP. - CORRECT ANSWER: Oxidative phosphorylation
occurs in 3 phases. The first phase is the flow of electrons from NADH and FADH2.
What happens after this first phase is complete?
ammonium (NH4+) - CORRECT ANSWER: What is the following chemical species?
arginine - CORRECT ANSWER: What amino acid is the following structure?
as protons flow through ATP synthase and back into the mitochondrial matrix -
CORRECT ANSWER: Energy released ___ is utilized for the synthesis of ATP.
aspartate - CORRECT ANSWER: What amino acid is the following structure?
