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HomeHomework Helpcell-biologyMicrotubules

Microtubules

Microtubules are cylindrical structures composed of tubulin protein subunits that form part of the cytoskeleton in eukaryotic cells, providing structural support, facilitating intracellular transport, and playing a crucial role in cell division. They are dynamic, capable of rapid growth and shrinkage, which allows them to adapt to the needs of the cell.

intermediate
2 hours
Cell Biology
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Overview

Microtubules are essential components of the cytoskeleton in eukaryotic cells, providing structural support and facilitating various cellular processes. They are composed of tubulin proteins that assemble into hollow tubes, allowing them to perform functions such as maintaining cell shape, enabling ...

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Key Terms

Tubulin
A protein that polymerizes to form microtubules.

Example: Tubulin dimers assemble into microtubules.

Cytoskeleton
A network of fibers that provides structural support to the cell.

Example: Microtubules are a key component of the cytoskeleton.

Dynamic Instability
The rapid switching between growth and shrinkage of microtubules.

Example: Dynamic instability allows microtubules to adapt to cellular needs.

Mitotic Spindle
A structure formed by microtubules that segregates chromosomes during cell division.

Example: The mitotic spindle ensures each daughter cell receives the correct number of chromosomes.

Motor Proteins
Proteins that move along microtubules to transport cellular cargo.

Example: Kinesin and dynein are motor proteins that travel along microtubules.

Polymerization
The process of linking monomers to form a polymer, such as microtubules.

Example: Tubulin polymerization leads to microtubule formation.

Related Topics

Cytoskeleton
The network of fibers that provides structural support to cells, including microtubules, microfilaments, and intermediate filaments.
intermediate
Cell Division
The process by which a parent cell divides into two or more daughter cells, involving microtubules for chromosome segregation.
intermediate
Motor Proteins
Proteins that move along microtubules and are essential for intracellular transport and cellular movement.
intermediate

Key Concepts

Structure of microtubulesFunctions in cellsRole in cell divisionMicrotubule dynamics