Question

What are microtubules and microfilaments?

Answer 1

Hey!!
Microtubules=Microtubules are a component of the cytoskeleton, found throughout the cytoplasm. These tubular polymers of tubulin can grow as long as 50 micrometres and are highly dynamic.
Microfilaments=A small rod-like structure, about 4–7 nanometres in diameter, present in numbers in the cytoplasm of many eukaryotic cells.

Answer 2

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HERE IS YOUR ANSWER :- 

Microfilaments and microtubules are the parts of any organism's cells that provide strength and structural support. They are the major components of the cytoskeleton, a framework of proteins that give the cell its shape and prevent it from collapsing. They are also the ones responsible for cell movement, as in the case of muscle cells.