CH9 Respiration Flashcards
Cellular respiration
process where living cells obtain energy from organic molecules
Aerobic / Anaerobic Respiration
With/ without oxygen
greater ATP yield w/ O2
Glucose Metabolism Net Reaction
C6H1206 + 6O2 —-> 6 CO2 + 6 H20
GLYCOLYSIS
- Occurs in Cytoplasm
- Universal process
- Starts w/ Glucose, ends w/ Pyruvate
Citric Acid (Krebs) Cycle
- Mitochondria
- breaks down Pyruvate —> acetyl group
- Acetyl group oxidized —> 2CO2
- Yield is MANY NADH electron carriers
Oxidative Phosphorylation #1
- NADH Electrons transferred to ETC
Ox. Phos. #2
- ETC transports H+ from matrix to inner membrane creating electrochemical gradient (proton motor force)
Ox. Phos #3
H+ returns to matrix by way of membrane channel (ATP Synthase) ATP Molecules formed
Chemiosmosis
Glycolysis Net Yield
2 ATP & 2 NADH
Citric Acid Cycle Net Yield
per Glucose
- 4 CO2
- 2 ATP
- 6 NADH
- 2 FADH2
ETC Location
Mitochondria matrix membrane
Low energy electrons
FADH
High energy electrons
NADH
ATP Synthase
channel protein facilitating Phosphorylation
Ox. Phos RXN
4H+ + 4e- +O2 = 2 H2O
Chemiosmosis
ATP synthesis as H+ is moved across membrane
36 ATP breakdown
- x2 from Glycoysis
- x2 ATP from Krebs Cycle
- x32 ATP from chemiosmosis/ Ox. Phos.
2 types of fermentation
- Alcohol (pyruvate –>ethanol)
2. Lactic acid ( pyruvate reduced by NADH)
Products of Lactic Acid fermentation
- fungi= cheese (propionic acid)
2. bacteria = Yoghurt (lactobacillus)
Net ATP produced by Fermentation…
x2 ATP per glucose
