Question

Which of the following show (9 + 0) arrangement ?

• A. Centriole and basal bodies
• B. Cilia
• C. Centriole
• D. Cilia and flagella

Answer 1

The correct option is A Centriole and basal bodies

Centrosome comprises of two centrioles. The two centrioles lie at right angles to each other. Each centriole has a cartwheel organisation. There is a whorl of nine peripheral triplet fibrils of tubulin called as 9+0 arrangement.
Basal bodies are micro-cylinders that lie below the plasmalemma at the base of flagella and cilia. The structure is similar to a centriole with a diameter of 0.1 to 0.2 micrometre, 9+0 constitution with a cartwheel structure in the proximal region.

So, the correct answer is option A.