Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

24. Metabolism and Nutrition

Cellular Respiration: Krebs Cycle

Anatomy & Physiology

24. Metabolism and Nutrition

Cellular Respiration: Krebs Cycle

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Multiple Choice

Which of the following is the only metabolic pathway of cellular respiration that generates FADH2?

Electron Transport Chain

Krebs Cycle

Fermentation

Glycolysis

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Verified step by step guidance

Begin by understanding the role of FADH2 in cellular respiration. FADH2 is a reduced coenzyme that carries electrons to the electron transport chain, where it contributes to the production of ATP.

Review the main stages of cellular respiration: Glycolysis, Krebs Cycle (also known as the Citric Acid Cycle), and the Electron Transport Chain. Each stage has distinct functions and products.

Focus on the Krebs Cycle, which occurs in the mitochondrial matrix. This cycle is responsible for the oxidation of acetyl-CoA, producing NADH, FADH2, and ATP (or GTP).

Identify the specific step in the Krebs Cycle where FADH2 is generated. This occurs during the conversion of succinate to fumarate, catalyzed by the enzyme succinate dehydrogenase.

Understand that neither Glycolysis nor the Electron Transport Chain directly produces FADH2. Glycolysis primarily generates ATP and NADH, while the Electron Transport Chain uses NADH and FADH2 to produce ATP.