T/F: The majority of the reactions of the urea cycle occur in the cytosol. - ANSWER true
T/F: The majority of the reactions of the urea cycle occur in the mitochondrial matrix. - AN-
SWER false
T/F: FADH2 yields 2.5 ATP molecules after donating electrons and hydrogen atoms to the
ETC. - ANSWER false
How many ATP molecules does NADH yield after donating electrons and hydrogen atoms to
the electron transfer chain (ETC)? - ANSWER 2.5 ATP per NADH
How many ATP molecules does FADH2 yield after donating electrons and hydrogen atoms to
the electron transfer chain (ETC)? - ANSWER 1.5 ATP per FADH2
T/F: ATP is invested in the urea cycle. - ANSWER true
How many total ATP are invested in the urea cycle? - ANSWER 3
T/F: There are 5 complexes associated with the ETC. - ANSWER false
How many complexes are associated with the ETC? - ANSWER 4
T/F: In the production of ATP via ATP synthase, the H+ ions move from the mitochondrial ma-
trix to the intermembrane space. - ANSWER false
1
, T/F: In the production of ATP via ATP synthase, the H+ ions move from the intermembrane
space to the mitochondrial matrix. - ANSWER true
The urea cycle involves ___ reactions (only those in the cyclic portion of the process). - AN-
SWER 4
What amino acids are involved in the urea cycle? - ANSWER ornithine, arginine, and as-
partate
Fumarate reenters the mitochondrion as - ANSWER malate
Urea is useful for excreting nitrogen from cells due to its - ANSWER ability to hydrogen
bonds with water and its high density of nitrogen in a small molecule
Which component of the urea cycle is also a member of the CAC? - ANSWER fumarate
Oxidative deamination results in the removal of ___ from amino acids. - ANSWER NH4+
(amine group)
What is the following chemical species? - ANSWER urea
What is the following chemical species? - ANSWER ammonium (NH4+)
What amino acid is the following structure? - ANSWER aspartate
What amino acid is the following structure? - ANSWER arginine
2
T/F: The majority of the reactions of the urea cycle occur in the mitochondrial matrix. - AN-
SWER false
T/F: FADH2 yields 2.5 ATP molecules after donating electrons and hydrogen atoms to the
ETC. - ANSWER false
How many ATP molecules does NADH yield after donating electrons and hydrogen atoms to
the electron transfer chain (ETC)? - ANSWER 2.5 ATP per NADH
How many ATP molecules does FADH2 yield after donating electrons and hydrogen atoms to
the electron transfer chain (ETC)? - ANSWER 1.5 ATP per FADH2
T/F: ATP is invested in the urea cycle. - ANSWER true
How many total ATP are invested in the urea cycle? - ANSWER 3
T/F: There are 5 complexes associated with the ETC. - ANSWER false
How many complexes are associated with the ETC? - ANSWER 4
T/F: In the production of ATP via ATP synthase, the H+ ions move from the mitochondrial ma-
trix to the intermembrane space. - ANSWER false
1
, T/F: In the production of ATP via ATP synthase, the H+ ions move from the intermembrane
space to the mitochondrial matrix. - ANSWER true
The urea cycle involves ___ reactions (only those in the cyclic portion of the process). - AN-
SWER 4
What amino acids are involved in the urea cycle? - ANSWER ornithine, arginine, and as-
partate
Fumarate reenters the mitochondrion as - ANSWER malate
Urea is useful for excreting nitrogen from cells due to its - ANSWER ability to hydrogen
bonds with water and its high density of nitrogen in a small molecule
Which component of the urea cycle is also a member of the CAC? - ANSWER fumarate
Oxidative deamination results in the removal of ___ from amino acids. - ANSWER NH4+
(amine group)
What is the following chemical species? - ANSWER urea
What is the following chemical species? - ANSWER ammonium (NH4+)
What amino acid is the following structure? - ANSWER aspartate
What amino acid is the following structure? - ANSWER arginine
2
