1. What are the three steps of aerobic cellular respiration? Which step occurs w

Question

1. What are the three steps of aerobic cellular respiration? Which step occurs whether Oxygen is present or not? 2. What are the key events in each step? 3. Where does each step take place in a cell? 4. Where in mitochondria is the enzyme ATP synthase localized? 5. Where in mitochondria is the electron transport chain localized? 6·The inner mitochondrial membranes are about five times the area of the outer mitochondrial membranes. What purpose must this serve? 7. The energy used to pump hydrogen ions from the mitochondrial matrix across the inner membrane and into the intermembrane space is derived from? 8. In the complete reactions of aerobic respiration, the energy for the majority of ATP synthesis is provided directly by A) glycolysis. B) Pyruvate oxidation C) citric acid cycle. D) the production of carbon dioxide and oxygen in the electron transport chain. E) a proton (H+) gradient across a membrane. 9. Which of the following produces the most ATP when glucose (C6H1206) is completely broken down to carbon dioxide (CO2) and water? A) glycolysis B) fermentation C) oxidation of pyruvate to acetyl CoA D) citric acid cycle (Kreb's cycle) E) oxidative phosphorylation 10. The primary role of oxygen in acrobic cellular respiration is to

Explanation / Answer

1) Three steps of aerobic cellular respiration are Glycolysis, Kreb's cycle and electron transport chain.

Glycolysis will occur whether the oxygen is present or not.

2) Key events in Glycolysis is to produce pyruvate for the Kreb's cycle. Kreb's cycle key event is to produce NADH and FADH2 for the production of of ATP. Key event in electron transport chain is to produce ATP.

3) Glycolysis occurs in cytoplasm. Kreb's cycle occur in mitochondrial matrix and electron transport chain occurs in inner membrane of mitochondria.

4) ATP synthase is located in the inner membrane of the mitochondria.

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