Question

Cartwheel structure is shown by
(a)Flagella
(b)Cilia
(c)Centriole
(d)All of the above

Answer 1

Hint The whorl of nine peripheral triplet fibers which are made up of tubulin are tilted at an angle of 40 degrees and make up the cartwheel structure. It is circular-shaped in the form of wheels.

Complete answer:
Cartwheel structure is shown by flagella, cilia and centriole. The animal cell consists of two centrioles which help the cell during cell division and work together in the process of mitosis and meiosis. It is found in lower plants and is usually presented near the nucleus but not visible when the cell is not dividing. Flagella is a lash-like appendage that protrudes from the cell body and can have one or several flagella which function as that of locomotion and is often used as a sensory organelle that is sensitive to chemicals and temperatures outside the cell. It is structurally similar to the archaea and functions in the same way but is termed as archaellum in the archaea. Cilia is an organelle that is found in eukaryotic cells and has a shape of a cylinder which projects from the much larger cell body. They are motile and non-motile in which the non-motile cilia serve as a sensory organically and the motile cilia are structurally similar with that of a flat dealer and function accordingly to communicate signals from the environment and other cells.

Additional information:
The centrosome is surrounded by amorphous pericentriolar materials which lie perpendicular to the centriole and centrosome and have an organization like a cartwheel. The centriole purses the peripheral fibrils and from the basal body of the cilia and flagella. The spindle fibers are also formed by it and give rise to the spindle apparatus during the cell division in animals.

So, the correct answer is 'All of the above'.

Note: The cytoplasm of the centrioles are formed in the centrosome and centrioles are present in all over plants and in primitive flagellates which include Chlamydomonas and dinoflagellates. Centriole develops during the flagellated stages in some species of amoeba and this appears during the amoeboid stage.