NEET BIOLOGY

Detailed explanation-1: -Eukaryotic cilia and flagella are motile organelles built on a scaffold of doublet microtubules and powered by dynein ATPase motors.

Detailed explanation-2: -Most motile bacteria move by means of flagella. The structures and pattern of movement of prokaryotic and eukaryotic flagella are different. Eukaryotes have one to many flagella, which move in a characteristic whiplike manner.

Detailed explanation-3: -Flagella have a primary function in cell locomotion. They are found on single cell eukaryotes and on spermatozoa, which each possess a single flagellum 70 m long.

Detailed explanation-4: -A flagellum is built on a template organelle called the basal body, which is constructed by modifying a centriole recruited from a centrosome (or from a pre-existing basal body) (Figure 1).