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

24. Metabolism and Nutrition

Essential Amino Acids

Anatomy & Physiology

24. Metabolism and Nutrition

Essential Amino Acids

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Multiple Choice

Which of the following do all amino acids have in common?

A phosphate group

A double bond in the side chain

A sulfur atom

An amino group and a carboxyl group

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Verified step by step guidance

Begin by understanding the basic structure of amino acids. Amino acids are the building blocks of proteins and have a central carbon atom, known as the alpha carbon.

Identify the common functional groups attached to the alpha carbon in all amino acids. These include an amino group (\(

NH

₂\)) and a carboxyl group (\(

COOH

\)).

Recognize that the amino group is a basic group, which can accept a proton, while the carboxyl group is acidic, capable of donating a proton.

Note that the side chain, or R group, varies among different amino acids, giving each its unique properties, but the amino and carboxyl groups are consistent across all amino acids.

Understand that the presence of a phosphate group, a double bond in the side chain, or a sulfur atom is not common to all amino acids. These features may be present in specific amino acids but are not universal.