NEET2006BotanyCell - The Unit of LifeActual
Which of the following statements regarding cilia is not correct?
Options
- Acilia contain an outer ring of nine doublet microtubules surrounding two single microtubules.
- Bthe organized beating of cilia is controlled by fluxes of Ca ²⁺ across the membrane
- Ccilia arc hair-like cellular appendages
- Dmicrotubules of cilia are composed of tubulin
Correct answer
B. the organized beating of cilia is controlled by fluxes of Ca ²⁺ across the membrane
Step-by-step solution
Cilia are minute, hair-like processes on the surface of protozoans or on metazoan cells. Each cilium contains a peripheral circle of nine doubled microtubules arranged around two single microtubules. Each microtubule is composed of tubulin proteins. The mechanism of ciliary movement is not completely understood. The fluxes of Ca ²⁺ across the membrane are not responsible for controlling the organised beating of cilia.