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

Microtubules and Cell Division

Cell Biology

15. Cytoskeleton and Cell Movement

Microtubules and Cell Division

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Multiple Choice

Which of the following microtubules do not attach to chromosomes?

Kinetochore

Chromosomal

Polar

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Verified step by step guidance

Understand the role of microtubules in cell division: Microtubules are part of the cytoskeleton and play a crucial role in mitosis and meiosis by forming the mitotic spindle, which helps segregate chromosomes into daughter cells.

Identify the types of microtubules involved in mitosis: There are three main types of microtubules in the mitotic spindle: kinetochore microtubules, polar microtubules, and astral microtubules.

Define kinetochore microtubules: These microtubules attach to the kinetochores, which are protein structures on the chromosome's centromere, and are responsible for pulling the chromosomes apart during cell division.

Define polar microtubules: These microtubules extend from the spindle poles and overlap at the cell's equator. They do not attach to chromosomes but instead help push the spindle poles apart, aiding in cell elongation.

Conclude which microtubules do not attach to chromosomes: Based on the definitions, polar microtubules do not attach to chromosomes, unlike kinetochore microtubules, which directly interact with the chromosomes.