Centrioles are composed of how many triplets of microtubules?
Correct answer: B. 9
- A. 6
- B. 9
- C. 12
- D. 15
Explanation
Animal cells, cells of some microorganisms, and lower plants contain two centrioles located near the exterior surface of the nucleus. In cross-section, each centriole consists of a cylindrical array of nine microtubules. However, each of the nine microtubules is further composed of three tubules. Centrioles are made up of nine microtubule triplets.
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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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