13 Questions
What is the byproduct of the breakdown of glucose in Glycolysis?
2 Pyruvate molecules
What is the energy requirement to start the Glycolysis process?
2 ATP
What is the net gain of ATP in the Glycolysis process?
2 ATP
What is the byproduct of the Pyruvate oxidation in the Krebs cycle?
Citric acid
What is the energy yield from each NADH in the Electron transport chain?
3 ATP
What is the total ATP yield from the Electron transport chain?
34 ATP
What is the characteristic of the Glycolysis process?
It is an anaerobic process
What is the result of the combination of Coenzyme A and pyruvate in the Krebs cycle?
A 6-carbon molecule called citric acid
What is the role of NAD+ and FAD in the Krebs cycle?
They pick up electrons from pyruvate
How many ATP are produced in the Krebs cycle?
2 ATP
What is the total ATP yield from the three processes of cellular respiration?
38 ATP
What is the role of ATP synthase in the Electron transport chain?
It generates ATP from NADH and FADH2
What is the total number of NADH produced in the Krebs cycle?
3 NADH per pyruvate, for a total of 6 NADH
Study Notes
Cellular Respiration
- Cellular respiration is the process of converting glucose into ATP through three stages: Glycolysis, Krebs Cycle, and Electron Transport Chain.
Glycolysis
- Breaks down glucose into 2 pyruvate molecules, each with 3 carbon atoms
- Anaerobic process, meaning it does not require oxygen
- Requires 2 ATP to initiate the process
- Net gain of 2 ATP and 2 NADH molecules
Krebs Cycle
- Aerobic process, meaning it requires oxygen
- Pyruvate molecules are oxidized, releasing one carbon atom
- Coenzyme A (2-carbon chain) combines with the remaining pyruvate to form citric acid (6-carbon molecule)
- NAD+ and FAD pick up electrons from pyruvate, generating NADH and FADH2
- 1 pyruvate molecule yields 3 NADH and 1 FADH2 molecules
- Total yield: 6 NADH and 2 FADH2 molecules
Electron Transport Chain
- NADH and FADH2 from the Krebs cycle are used to generate ATP
- ATP synthase produces ATP from the energy released by the electron transport chain
- 1 NADH molecule generates 3 ATP molecules
- 1 FADH2 molecule generates 2 ATP molecules
- Total ATP yield: 34 ATP molecules
Total ATP Yield
- Glycolysis: 2 ATP
- Krebs Cycle: 2 ATP
- Electron Transport Chain: 34 ATP
- Total: 38 ATP molecules
This quiz covers the three stages of cellular respiration, including glycolysis, pyruvate oxidation, and the Krebs cycle. It explains the processes of breaking down glucose into ATP, the role of oxygen, and the resulting ATP and NADH.
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