Cellular Respiration Review
What Are the 5 Stages of aerobic
cellular respiration?
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1. Glycolysis
2. Oxidation Of pyruvate to Acetyl CoA
3. Krebs Cycle
4. Electron Transport Chain
5. Chemiosmosis
What do both aerobic and anaerobic
cellular respiration have in common?
• Both run the process of Glycolysis outside of
the mitochondria.
• Both have a net yield of 2 ATP
What do You Need to know about
glycolysis?
- What is the starting reactant in Glycolysis?
Glucose
- How much ATP is needed in glycolysis, and how
much ATP is made Net and Gross amounts?
Needed= 2 ATP
Gross= 4 ATP
Net= 2 ATP
Requires
Glucose
No Oxygen
Anaerobic
Respiration
Yields 2
lactate or 2
ethanol
Anaerobic
Respiration
Produces
water
Net 2 ATP
Requires Oxygen
Net 36 ATP
Uses
Glycolysis
What is Important about Stage 2 in
Aerobic Cellular Respiration?
What Is Needed to start the reaction? And Where does this reactant
come from?
Pyruvate, Which is the product of Glycolysis in the
cytoplasm
What are The Products of the Stage 2 Acetyl- CoA reaction for every
2 Pyruvate?
2 Acetyl CoA
2 NADH
2 CO2
What do you need to know about the
Krebs Citric Acid Cycle?
What are the products of the Krebs Cycle for every 2 Acetyl CoA molecules?
2 FADH2
2 ATP
6 NADH
4 CO2
Starting with one glucose in the
beginning of Glycolysis, How
many spins of the Krebs Cycle
will occur?
Animation
2 Spins
Electron Transport Chain and
Chemiosmosis review.
How are the FADH2 and NADH molecules made throughout aerobic
respiration used in the ETC and Chemiosmosis?
They become reduced and give their H+ ions to create a
proton gradient for chemiosmosis.
How does the proton gradient result in the creation of ATP molecules
during Chemiosmosis?
The ATP synthase sends the H+ ions through the
inner membrane and phospharlizes ADP into ATP
How is Water (H2O) created in the Electron Transport Chain?
The final electron acceptor is oxygen which takes the
electron and becomes H2O
ETC and Chemiosmosis animation
Match each stage with where it occurs
in the Cell.
Glycolysis
Inner Mitochondrial Membrane
Oxidation of Pyruvate
Mitochondrial Matrix
Krebs Cycle
Cytoplasm
Electron transport chain
Proton Gradient
Chemiosmosis
Intermembrane Space
What is the net gain of ATP for each
stage of Cellular Respiration?
Glycolysis
2
Oxidation of Pyruvate
0
Krebs Cycle
2
Electron Transport Chain
0
Chemiosmosis
32
Total net gain in Aerobic
Respiration
36
How Much NADH is created in each of
the stages?
Glycolysis
2 NADH
Oxidation of Pyruvate
2 NADH
Krebs Cycle
6 NADH
How are ATPs made at each stage?
• Glycolysis- net 2 (substrate level
phosphorylation)
• Stage 3 – Krebs cycle- 2 ATP made (substrate
level phosphorylation)
• ETC and chemiosmosis –oxidative
phosphorylation -32 more!
• Net = 36 ATP