AP Bio Insta-Review Topic 3.6*: Cellular Respiration

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What is Cellular Respiration?

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Cellular respiration is the process by which cells convert glucose and oxygen into energy (ATP), carbon dioxide, and water.

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What are the three main stages of Cellular Respiration?

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The three main stages are Glycolysis, Krebs Cycle (Citric Acid Cycle), and Oxidative Phosphorylation.

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Where does Glycolysis occur?

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Glycolysis occurs in the cytosol of the cell.

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What is the main product of Glycolysis?

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The main products of Glycolysis are 2 ATP, 2 NADH, and 2 pyruvate molecules.

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Where does the Krebs Cycle take place?

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The Krebs Cycle takes place in the mitochondrial matrix.

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What is the main purpose of the Krebs Cycle?

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The main purpose of the Krebs Cycle is to produce electron carriers (NADH and FADH2) and ATP from the breakdown of acetyl-CoA.

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Where does the Electron Transport Chain occur?

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The Electron Transport Chain occurs in the inner mitochondrial membrane (cristae).

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What is the role of oxygen in Cellular Respiration?

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Oxygen acts as the final electron acceptor in the Electron Transport Chain, allowing for the production of water and ATP.

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What is the significance of the proton gradient in Cellular Respiration?

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The proton gradient created by the Electron Transport Chain is used by ATP synthase to produce ATP during oxidative phosphorylation.

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What is Anaerobic Respiration?

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Anaerobic respiration is a type of respiration that occurs without oxygen, resulting in the production of less energy and byproducts like lactic acid or ethanol.