Question

Arrangement of microtubules in a flagellum and a centriole is respectively ________.

• A. 9+2 and 9+1
• B. 9+! and 0+0
• C. 9+0 and 9+2
• D. 9+2 and 9+0

Answer 1

The correct option is D 9+2 and 9+0

A centriole possesses a whorl of nine peripheral fibrils. Fibrils are absent in the centre. The arrangement is, therefore, called 9+0. Flagellum contains an axoneme of a peripheral doublet fibrils and 2 central singlet fibrils. This arrangement is called 9+2 or 11 stranded.