Centrioles are composed of ________ triplets of microtubules.
Correct answer: B. 9
- A. 3
- B. 9
- C. 10
- D. 15
Explanation
A centriole has nine peripheral triplets of microtubules arranged in a cylinder, written as 9 + 0 because it lacks a central pair. The common mistake is choosing 3 by counting the microtubules in each triplet instead of counting the nine triplets around the centriole.
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About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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