Table of contents

Skip topic navigation

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

Introduction to Chemical Bonding

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Chemical Bonding

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 is present in both gram-positive and gram-negative bacterial cell walls?

Peptidoglycan

Teichoic acid

Outer membrane

Lipopolysaccharide

Previous problemNext problem

Verified step by step guidance

Understand the structure of bacterial cell walls: Bacteria are classified into two main types based on their cell wall structure: gram-positive and gram-negative.

Identify the components of gram-positive bacterial cell walls: Gram-positive bacteria have a thick peptidoglycan layer and teichoic acids, but they lack an outer membrane and lipopolysaccharides.

Identify the components of gram-negative bacterial cell walls: Gram-negative bacteria have a thin peptidoglycan layer, an outer membrane, and lipopolysaccharides, but they do not have teichoic acids.

Determine the common component: Peptidoglycan is present in both gram-positive and gram-negative bacterial cell walls, although the thickness of the layer differs between the two types.

Conclude the analysis: Based on the structural differences, peptidoglycan is the only component listed that is found in both types of bacterial cell walls.