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

15. Cytoskeleton and Cell Movement

Cilia and Flagella

Cell Biology

15. Cytoskeleton and Cell Movement

Cilia and Flagella

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Multiple Choice

Microtubules are arranged in which of the following arrays?

9 + 3

9 + 2

8 + 3

8 + 2

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Verified step by step guidance

Understand the structure of microtubules: Microtubules are cylindrical structures made of tubulin proteins and are a key component of the cytoskeleton in eukaryotic cells.

Learn about the arrangement of microtubules in cilia and flagella: In these structures, microtubules are typically arranged in a '9 + 2' array, which means there are nine doublet microtubules arranged in a circle around two central singlet microtubules.

Differentiate between the '9 + 2' and other possible arrangements: The '9 + 2' arrangement is specific to motile cilia and flagella, whereas other structures might have different arrangements, such as centrioles and basal bodies, which have a '9 + 0' arrangement.

Identify the correct answer based on the typical arrangement in cilia and flagella: Since the problem asks about the arrangement of microtubules, and the '9 + 2' array is characteristic of cilia and flagella, this is the correct answer.

Review the function of the '9 + 2' arrangement: This specific arrangement allows for the bending and movement of cilia and flagella, which is essential for cell motility and fluid movement across cell surfaces.