Exam 1 - Cellular Respiration Flashcards
1
Q
What are the characteristics of chemiosmosis?
A
- common to both chloroplasts and mitochondria
- uses membranes to couple redox reactions to ATP production
- ETC pumps H+ across a membrane as e- are passed through carriers
- potential energy stored as H+ gradient
2
Q
How do chloroplasts and mitochondria differ?
A
Chloroplasts:
- photophosphorylation
- e- come from water, produce oxygen
- light energy drives e- transport
- transform light energy into chemical energy
Mitochondria:
- e- extracted from organic molecules
- oxygen as terminal e- acceptor, produce water
- transfer chemical energy from food to ATP
3
Q
What are the characteristics of glycolysis?
A
- glucose partially oxidized to pyruvate
- net of 2 ATP and 2 NADH produced
4
Q
What are the characteristics of the citric acid cycle?
A
- pyruvate oxidized completely to CO2
- net production of 2 ATP, 6 NADH, and 2 FADH2 per 1 glucose
5
Q
What are the characteristics of oxidative phosphorylation?
A
- e- transport along inner membrane of mitochondria from NADH to O2
- major production of ATP, 26-28 molecules
- some NAD+ regenerated for glycolysis
6
Q
What is the net production of ATP from cellular respiration?
A
30-32 ATP
7
Q
What is the role of O2 in cellular respiration?
A
-electron acceptor that drives the entire process, especially oxidative phosphorylation
