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

3. Energy & Cell Processes

Types of Phosphorylation

Anatomy & Physiology

3. Energy & Cell Processes

Types of Phosphorylation

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Multiple Choice

How many molecules of ATP are gained by substrate-level phosphorylation from the complete breakdown of a single molecule of glucose in the presence of oxygen?

About 16 ATP

About 32 ATP

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Verified step by step guidance

Begin by understanding the process of cellular respiration, which includes glycolysis, the citric acid cycle, and oxidative phosphorylation.

In glycolysis, glucose is broken down into two molecules of pyruvate. During this process, substrate-level phosphorylation occurs, producing a net gain of 2 ATP molecules.

Next, consider the citric acid cycle (also known as the Krebs cycle), where each acetyl-CoA molecule contributes to the production of ATP through substrate-level phosphorylation. However, this cycle primarily generates NADH and FADH2 for oxidative phosphorylation.

Substrate-level phosphorylation directly produces ATP without the involvement of the electron transport chain. In the complete breakdown of glucose, only glycolysis contributes to ATP production via substrate-level phosphorylation.

Therefore, from the complete breakdown of a single molecule of glucose, substrate-level phosphorylation results in a net gain of 2 ATP molecules from glycolysis alone.