Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

18. Cell Junctions and Tissues

Plant Tissue

Cell Biology

18. Cell Junctions and Tissues

Plant Tissue

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Multiple Choice

The secondary cell wall is composed of:

Pectins

Ligin

Integrins

GAGs

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Verified step by step guidance

Understand the structure of plant cell walls: Plant cell walls have primary and secondary layers. The primary cell wall is flexible and allows for growth, while the secondary cell wall is more rigid and provides additional support.

Identify the components of the primary cell wall: The primary cell wall is mainly composed of cellulose, hemicellulose, and pectins. These components provide flexibility and strength.

Learn about the secondary cell wall: The secondary cell wall is deposited after the cell has stopped growing. It is thicker and more rigid than the primary cell wall.

Recognize the main components of the secondary cell wall: The secondary cell wall is primarily composed of cellulose, hemicellulose, and lignin. Lignin is a complex organic polymer that provides rigidity and resistance to decay.

Differentiate between the options given: Pectins are mainly found in the primary cell wall, integrins are proteins associated with animal cells, and GAGs (glycosaminoglycans) are components of animal extracellular matrices. Lignin is the correct component of the secondary cell wall in plants.