GENERAL HISTOLOGY

Detailed explanation-1: -The axoneme usually has nine doublets of radially arranged peripheral (9) microtubules, and a pair of centrally (2) located microtubules. This gives rise to the 9+2 arrangement.

Detailed explanation-2: -Both flagella and cilia have a 9 + 2 arrangement of microtubules. This arrangement refers to the 9 fused pairs of microtubules on the outside of a cylinder, and the 2 unfused microtubules in the center. Dynein “arms” attached to the microtubules serve as the molecular motors.

Detailed explanation-3: -Motile cilia and eukaryotic flagella are characterized by the canonical “9+2” arrangement of microtubules in which nine doublet microtubules surround a central pair of singlet microtubules.

Detailed explanation-4: -So, the correct answer is ‘Flagella’.

Detailed explanation-5: -Also known as kinetosome, it is the microtubule organizing center for flagellar microtubules. This characteristic 9 + 2 arrangement of microtubules is seen only in eukaryotic flagella.