Question

Which of the following statements is incorrect for centrioles?

• A. Both the centrioles in a centrosome lie perpendicular to each other
• B. Central proteinaceous hub is missing in a centriole
• C. Each centriole has an organisation like that of a cartwheel
• D. Centrosome usually contains 2 cylindrical centrioles

Answer 1

The correct option is B Central proteinaceous hub is missing in a centriole

Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope. Centrioles play a role in organizing microtubules that serve as a skeletal system of the cell.

Each centriole has cartwheel organization. A centriole is made up of 9 evenly spaced microtubules that are made up of tubulin protein. Also, the central part of the proximal region of the centriole is a proteinaceous hub that is connected with the triplets on the peripheral side by radial spokes.