The 9 plus 2 arrangement of microtubules is found in
Correct answer: D. cilia and eukaryotic flagella
- A. centrioles
- B. bacterial flagella
- C. microvilli of the intestine
- D. cilia and eukaryotic flagella
Explanation
Cilia and eukaryotic flagella contain nine doublet microtubules around a central pair, an arrangement visible only by electron microscopy. Centrioles are 9 plus zero triplets, and bacterial flagella are solid protein filaments with no microtubules at all.
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