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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

2. Cell Chemistry & Cell Components

Proteins

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Proteins

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Multiple Choice

What are the two basic types of secondary structure in proteins?

Beta pleated sheet and random coil

Alpha helix and beta pleated sheet

Gamma turn and random coil

Alpha helix and gamma turn

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Verified step by step guidance

Understand that proteins have different levels of structure: primary, secondary, tertiary, and quaternary.

Recognize that secondary structure refers to the local folded structures that form within a polypeptide due to interactions between atoms of the backbone.

Identify the two most common types of secondary structures in proteins: the alpha helix and the beta pleated sheet.

The alpha helix is a right-handed coil where each amino acid corresponds to a 100-degree turn in the helix, and is stabilized by hydrogen bonds between the backbone atoms.

The beta pleated sheet consists of beta strands connected laterally by at least two or three backbone hydrogen bonds, forming a sheet-like structure.