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Get Answers to all your Questions
- #Medical
- #Cell Structure and Function
- #Class 11
- #National Eligibility Cum Entrance Test
- #Biology
- #National Eligilibility Cum Entrance Test
Microtubules are the constituents of:
Option: 1
Cilia, Flagella and Peroxisomes
Option: 2
Spindle fibres, Centrioles and Cilia
Option: 3
Centrioles, Spindle fibres and Chromatin
Option: 4
Centrosome, Nucleosome and Centrioles
Answers (1)
The Cytoskeleton -
The Cytoskeleton
- Cytoskeleton refers to the network of protein fibres that help in maintaining the shape of the cell and help in the movement of the cell.
- There are three types of protein fibres within cytoskeleton:
- microfilaments,
- intermediate filaments, and
- microtubules
Microtubules
- These are small hollow tubules.
- Their walls are made up of polymerised dimers of a-tubulin and B-tubulin.
- They have a diameter of 25 nm. They are the widest component of the cytoskeleton.
- They help the cell resist compression, provide a track along which vesicles move through the cell and pull replicated chromosomes to opposite ends of a dividing cell.
- Like microfilaments, microtubules can dissolve and reform quickly.
-
Spindle fibres, centrioles, cilia and flagella are made up of microtubules.
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