EVERYDAY SCIENCE

Detailed explanation-1: -Each centriole has a cartwheel constitution. There is a whorl of nine peripheral triplet fibres of tubulin tilted at an angle of 40 degrees. In cilia and flagella also the cartwheel structure is present but the fibrils have 9+2 arrangement-peripheral doublet fibrils are tilted at an angle of 10 degrees.

Detailed explanation-2: -The cartwheel is a subcentriolar structure consisting of a central hub and nine radially arranged spokes, located at the proximal end of the centriole. It appears at the initial stage of the centriole assembly process as the first ninefold symmetrical structure.

Detailed explanation-3: -Cartwheel structures include flagella, cilia, and centrioles. Two centrioles exist in each animal cell, which helps the cell divide and participate in the mitosis and meiosis processes. It can be found all around the nucleus in lower plants, but it is not visible when the cell is not dividing.

Detailed explanation-4: -Both the centrioles in a centrosome lie perpendicular to each other in which each has an organization like “cartwheel". They are made up of nine evenly spaced peripheral fibrils of tubulin.

Detailed explanation-5: -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 the cell’s skeletal system.