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

2. Cell Chemistry & Cell Components

Functional Groups

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Functional Groups

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Multiple Choice

Which of these is found in all amino acids?

—COOH

—COH

—OH

both —COOH and —NH₂

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Verified step by step guidance

Understand the basic structure of an amino acid, which consists of a central carbon atom (known as the alpha carbon) bonded to four different groups: an amino group (—NH2), a carboxyl group (—COOH), a hydrogen atom, and a variable side chain (R group).

Identify the functional groups that are common to all amino acids. The amino group (—NH2) and the carboxyl group (—COOH) are present in every amino acid, regardless of the side chain.

Recognize that the —COH group is not a standard component of amino acids. Instead, the —COOH group is the carboxyl group, which is a defining feature of amino acids.

Note that the —OH group is not a universal feature of amino acids. While some amino acids may have an —OH group in their side chain (such as serine or threonine), it is not present in all amino acids.

Conclude that the correct answer is both —COOH and —NH2, as these are the functional groups found in all amino acids, forming the backbone of their structure.