The final step of aerobic respiration is oxidative phosphorylation, which consists of 2 sub-phases - electron transport chain and chemiosmosis. Which step requires oxygen? What is the role of oxygen in this step? Which of these 2 steps creates ATP?
The final step of aerobic respiration is oxidative phosphorylation, which consists of 2 sub-phases - electron transport chain and chemiosmosis. Which step requires oxygen? What is the role of oxygen in this step? Which of these 2 steps creates ATP?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Transcribed Image Text:**The Final Step of Aerobic Respiration: Oxidative Phosphorylation**
Oxidative phosphorylation is the concluding phase of aerobic respiration and consists of two sub-phases: the electron transport chain and chemiosmosis.
1. **Electron Transport Chain (ETC):**
- **Role of Oxygen**: Oxygen is critical in the electron transport chain as it acts as the final electron acceptor. Without oxygen, the electrons would not pass through the chain, and the entire process would halt.
2. **Chemiosmosis:**
- **ATP Production**: This step is responsible for the synthesis of ATP. The ETC creates a proton gradient across the mitochondrial membrane, which drives ATP synthesis through ATP synthase.
In summary, oxygen is required during the electron transport chain to accept electrons, and ATP is primarily generated during chemiosmosis.
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