Centrioles are made up of _ microtubules:
Correct answer: B. 27
- A. 9
- B. 27
- C. 3
- D. 12
Explanation
Centrioles are key cellular structures involved in cell division, found in animal cells. Structurally, each centriole is made up of nine sets of microtubule triplets, arranged in a cylindrical form. Each triplet contains three microtubules, so when you multiply the nine triplets by the three microtubules per triplet, you get a total of 27 microtubules forming the centriole. Therefore, Option B (27) is the correct answer. Option A (9) incorrectly considers only the number of triplet groups, Option C (3) focuses on the individual microtubules within a triplet rather than the entire structure, and Option D (12) is unrelated to the microtubule count in centrioles.
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