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7.1 Overview of Cellular Respiration
During cellular respiration, the oxidation of glucose drives the synthesis of ATP molecules.

NAD+ and FAD are coenzymes which carry electrons in redox reactions.

The breakdown of glucose requires four phases: three metabolic pathways and one individual reaction.		 1. How efficient is the conversion of energy in glucose to energy in ATP as a result of cellular respiration?
Answer

2. What is the role of NAD+ and FAD in cellular respiration?
Answer		Essential Study Partner
Introduction
Respiration
7.2 Outside the Mitochondria: Glycolysis
Glycolysis is a metabolic pathway that partially breaks down glucose outside the mitochondria.

During glycolysis, glucose is oxidized to molecules of pyruvic acid.		 3. Why must there be an energy investment at the start of glycolysis?
Answer

4. How is ATP formed during glycolysis?
Answer		Essential Study Partner
Glycolysis

Art Quizzes
Substrate-Level Phosphorylation
Pyruvate Pathways

Study Guide
Glycolysis
7.3 Inside the Mitochondria
The transition reaction and the citric acid cycle, which occur inside the mitochondria, continue the oxidation of glucose products until carbon dioxide is given off.

The electron transport system, which receives electrons from NAD+ and FAD, produces most of the ATP during cellular respiration.

Oxygen, the final acceptor of electrons from the electron transport system, is reduced to water.		 5. Summarize the events of the citric acid cycle.
Answer

6. In the electron transport system, how is ATP formed differently than it is during glycolysis and during the citric acid cycle?
Answer		Essential Study Partner
Transition
Krebs Cycle
Electron Transport

Art Quizzes
Overview of ATP Synthesis
ATP Theoretical Yield

Animation Quiz
Electron Transport Chain and ATP Production

Study Guides
The Krebs Cycle
The Electron Transport Chain

Explorations
Oxidative Respiration

Labeling Exercises
Aerobic Cellular Respiration (29.0K)
Organization of Cristae (51.0K)
7.4 Fermentation
Fermentation is a metabolic pathway that partially breaks down glucose under anaerobic conditions.		 7. Why do cells sometimes turn to fermentation after glycolysis?
Answer

8. What is oxygen debt?
Answer		Essential Study Partner
Fermentation
7.5 Metabolic Pool and Biosynthesis
A number of molecules in addition to glucose can be broken down to drive ATP synthesis.		 9. Explain the metabolic pool concept.
Answer		Essential Study Partner
Other Nutrients

Art Quiz
Catabolism of Proteins and Fats





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