Biochem Module 8 Exam
1. T/F: The majority of the reactions of the urea cycle occur in the
cytosol.
Ans: true
2. T/F: The majority of the reactions of the urea cycle occur in the
mitochondrial matrix.
Ans: false
3. T/F: FADH2 yields 2.5 ATP molecules after donating electrons and
hydrogen atoms to the ETC.
Ans: false
4. How many ATP molecules does NADH yield after donating
electrons and hydrogen atoms to the electron transfer chain (ETC)?
Ans: 2.5 ATP per NADH
5. How many ATP molecules does FADH2 yield after donating
electrons and hydrogen atoms to the electron transfer chain (ETC)?
Ans: 1.5 ATP per FADH2
6. T/F: ATP is invested in the urea cycle.
Ans: true
7. How many total ATP are invested in the urea cycle?
Ans: 3
8. T/F: There are 5 complexes associated with the ETC.
Ans: false
, 9. How many complexes are associated with the ETC?
Ans: 4
10. T/F: In the production of ATP via ATP synthase, the H+ ions
move from the mitochondrial matrix to the intermembrane space.
Ans: false
11. T/F: In the production of ATP via ATP synthase, the H+ ions
move from the intermembrane space to the mitochondrial matrix.
Ans: true
12. The urea cycle involves ___ reactions (only those in the cyclic
portion of the process).
Ans: 4
13. What amino acids are involved in the urea cycle?
Ans: ornithine, arginine, and aspartate
14. Fumarate reenters the mitochondrion as
Ans: malate
15. Urea is useful for excreting nitrogen from cells due to its
Ans: ability to hydrogen bonds with water and its high density
of nitrogen in a small molecule
16. Which component of the urea cycle is also a member of the CAC?
Ans: fumarate
17. Oxidative deamination results in the removal of ___ from amino
acids.
1. T/F: The majority of the reactions of the urea cycle occur in the
cytosol.
Ans: true
2. T/F: The majority of the reactions of the urea cycle occur in the
mitochondrial matrix.
Ans: false
3. T/F: FADH2 yields 2.5 ATP molecules after donating electrons and
hydrogen atoms to the ETC.
Ans: false
4. How many ATP molecules does NADH yield after donating
electrons and hydrogen atoms to the electron transfer chain (ETC)?
Ans: 2.5 ATP per NADH
5. How many ATP molecules does FADH2 yield after donating
electrons and hydrogen atoms to the electron transfer chain (ETC)?
Ans: 1.5 ATP per FADH2
6. T/F: ATP is invested in the urea cycle.
Ans: true
7. How many total ATP are invested in the urea cycle?
Ans: 3
8. T/F: There are 5 complexes associated with the ETC.
Ans: false
, 9. How many complexes are associated with the ETC?
Ans: 4
10. T/F: In the production of ATP via ATP synthase, the H+ ions
move from the mitochondrial matrix to the intermembrane space.
Ans: false
11. T/F: In the production of ATP via ATP synthase, the H+ ions
move from the intermembrane space to the mitochondrial matrix.
Ans: true
12. The urea cycle involves ___ reactions (only those in the cyclic
portion of the process).
Ans: 4
13. What amino acids are involved in the urea cycle?
Ans: ornithine, arginine, and aspartate
14. Fumarate reenters the mitochondrion as
Ans: malate
15. Urea is useful for excreting nitrogen from cells due to its
Ans: ability to hydrogen bonds with water and its high density
of nitrogen in a small molecule
16. Which component of the urea cycle is also a member of the CAC?
Ans: fumarate
17. Oxidative deamination results in the removal of ___ from amino
acids.
