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

Lipids

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Lipids

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Multiple Choice

The molecule shown the figure is a ________.

Fatty acid.

Wax.

Steroid.

Triacylglycerol.

Phospholipid.

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Verified step by step guidance

Examine the structure of the molecule in the image. Notice the presence of four fused rings, which is a characteristic feature of steroids.

Identify the functional groups attached to the rings. In this case, there are hydroxyl (OH) groups and carbonyl (C=O) groups, which are common in steroid structures.

Compare the structure to the options provided: fatty acid, wax, steroid, triacylglycerol, and phospholipid. Recognize that fatty acids typically have long hydrocarbon chains, waxes are esters of long-chain alcohols and fatty acids, triacylglycerols are composed of glycerol and three fatty acids, and phospholipids contain a phosphate group.

Understand that steroids are a class of lipids characterized by a carbon skeleton with four fused rings. The structure in the image matches this description.

Conclude that the molecule shown in the figure is a steroid based on the presence of the four-ring structure and the functional groups present.