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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

Enzymes

Anatomy & Physiology

3. Energy & Cell Processes

Enzymes

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Multiple Choice

Which of the following statements about enzymes is/are true?

Enzymes increase the rate of a reaction by raising the activation energy for reactions.

Enzymes react with their substrate (form chemical bonds), forming an enzyme-substrate complex, which irreversibly alters the enzyme.

The more heat that is added to a reaction, the faster the enzymes will function.

All of the listed responses are correct.

Enzymes speed up the rate of the reaction without changing the DG for the reaction.

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Verified step by step guidance

Understand the role of enzymes: Enzymes are biological catalysts that speed up chemical reactions without being consumed or permanently altered in the process.

Examine the concept of activation energy: Enzymes lower the activation energy required for a reaction, making it easier for the reaction to occur, rather than raising it.

Consider the enzyme-substrate interaction: Enzymes bind to substrates to form an enzyme-substrate complex, but this interaction is typically reversible and does not irreversibly alter the enzyme.

Analyze the effect of temperature on enzyme activity: While moderate increases in temperature can increase enzyme activity, excessive heat can denature enzymes, reducing their effectiveness.

Clarify the statement about ΔG (Gibbs free energy): Enzymes do not change the ΔG of a reaction; they only affect the rate at which equilibrium is reached.