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 Heart2h 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

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Enzyme activity is affected by pH because __________.

most substrates do not function well at high or low pH

low pH will denature all enzymes

changes in pH can cause loss of cofactors from the enzyme

the binding of hydrogen ions to the enzyme absorbs energy and thus there may not be enough energy to overcome the activation energy barrier

high or low pH may disrupt hydrogen bonding or ionic interactions and thus change the shape of the active site

Previous problemNext problem

Verified step by step guidance

Understand that enzymes are proteins that catalyze biochemical reactions by lowering the activation energy required for the reaction to proceed.

Recognize that the active site of an enzyme is where the substrate binds, and this site is highly specific to the substrate's shape and chemical properties.

Learn that enzymes have an optimal pH range where they function most effectively. Deviations from this optimal pH can affect enzyme activity.

Explore how changes in pH can alter the ionization state of amino acids in the enzyme, particularly those involved in hydrogen bonding and ionic interactions, which are crucial for maintaining the enzyme's structure.

Realize that when the enzyme's structure is altered due to changes in pH, the shape of the active site may change, potentially reducing the enzyme's ability to bind substrates and catalyze reactions effectively.