In cross-section each Centriole consist of nine (each in triplets) of:
Correct answer: C. Microtubules
- A. Microfilaments
- B. Microvilli
- C. Microtubules
- D. Intermediate filaments
Explanation
Typical centrioles are made of 9 triplets of microtubules organized with radial symmetry. Microfilaments, also called actin filaments, are polymers of the protein actin that are part of a cell's cytoskeleton. Microvilli are microscopic cellular membrane protrusions that increase the surface area for diffusion and minimize any increase in volume, and are involved in a wide variety of functions. Intermediate filaments are important components of the cell's cytoskeletal system. They may stabilize organelles, like the nucleus, or they may be involved in specialized junctions. They are distinguished from "thin filaments" by their size (8-10 nm) and the fact that thin filaments are motile.
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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