Cellular Respiration Overview | Glycolysis, Krebs Cycle & Electron Transport Chain
2 Minute Classroom・4 minutes read
Cellular respiration breaks down macromolecules to produce ATP through glycolysis, the Krebs cycle, and the electron transport chain, resulting in a net ATP production of 32 ATP from a single glucose molecule under theoretical conditions.
Insights
- Glycolysis is the initial step of cellular respiration, converting glucose into ATP with a net production of two ATP molecules.
- The Krebs cycle, the subsequent phase, generates a significant amount of ATP from a single glucose molecule, although the practical yield varies from the theoretical maximum due to real-world conditions.
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Recent questions
What is cellular respiration?
Cellular respiration is the process where cells break down macromolecules like glucose to produce ATP through glycolysis, the Krebs cycle, and the electron transport chain.
What is the first step of cellular respiration?
The first step of cellular respiration is glycolysis, which requires a glucose input and two ATP molecules, producing four ATP, two NADH, and two pyruvate molecules, resulting in a net ATP production of two.
What is the Krebs cycle?
The Krebs cycle is the second step of cellular respiration, where each acetyl CoA produces 6 NADH, 2 FADH2, and 2 ATP, leading to a total of 32 ATP from a single glucose molecule, although the theoretical yield is 38 ATP.
How many ATP molecules are produced in cellular respiration?
Cellular respiration can yield between 30 and 32 ATP molecules from a single glucose molecule through the combined processes of glycolysis, the Krebs cycle, and the electron transport chain.
What are the main components of cellular respiration?
The main components of cellular respiration are glycolysis, the Krebs cycle, and the electron transport chain, which work together to break down glucose and produce ATP for cellular energy.
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Summary
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Cellular Respiration: ATP Production in Cells
- Cellular respiration is the process where cells break down macromolecules like glucose to produce ATP, involving three main steps: glycolysis, the Krebs cycle, and the electron transport chain.
- Glycolysis, the first step, requires a glucose input and two ATP molecules, producing four ATP, two NADH, and two pyruvate molecules, resulting in a net ATP production of two.
- The Krebs cycle follows, with each acetyl CoA producing 6 NADH, 2 FADH2, and 2 ATP, leading to a total of 32 ATP from a single glucose molecule, although the theoretical yield is 38 ATP, with actual conditions yielding between 30 and 32 ATP.
