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

2. Cell Chemistry & Cell Components

Proteins

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Proteins

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

Which of the following best describes how amino acids affect the tertiary structure of a protein?

Amino acids determine the sequence of nucleotides in DNA, which indirectly influences protein structure.

Amino acids interact through various bonds and interactions, such as hydrogen bonds and disulfide bridges, to stabilize the tertiary structure.

Amino acids are responsible for the primary structure, which has no impact on the tertiary structure.

Amino acids only affect the quaternary structure by forming protein complexes.

Previous problemNext problem

Verified step by step guidance

Understand the levels of protein structure: primary, secondary, tertiary, and quaternary. The primary structure is the sequence of amino acids, secondary involves local folding patterns like alpha helices and beta sheets, tertiary is the overall 3D shape, and quaternary is the arrangement of multiple polypeptide chains.

Recognize that the tertiary structure is influenced by interactions between the side chains (R groups) of amino acids. These interactions include hydrogen bonds, ionic bonds, van der Waals forces, and disulfide bridges.

Identify that amino acids have different properties based on their side chains, such as being hydrophobic, hydrophilic, acidic, or basic, which affect how they interact with each other and contribute to the protein's 3D shape.

Consider how these interactions stabilize the tertiary structure. For example, hydrophobic interactions cause nonpolar side chains to cluster away from water, while disulfide bridges form covalent bonds between cysteine residues, providing structural stability.

Conclude that amino acids directly affect the tertiary structure through these interactions, rather than indirectly through DNA or only affecting other levels of protein structure.