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Microtubules are the constituents of

1. Cilia, Flagella and Peroxisomes
2. Spindle fibres, Centrioles and Cilia
3. Centrioles, Spindle fibres and Chromatin
4. Centrosome, Nucleosome and Centrioles

Correct answer: Spindle fibres, Centrioles and Cilia

Solution

Microtubules are tubulin polymers that form the core of the mitotic spindle, the internal scaffold of centrioles, and the axoneme of cilia. The other choices include structures like peroxisomes, chromatin, or nucleosomes, which are not microtubule-based.

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