Question

. In eukaryotic flagellum, the bending of microtubules is driven by:

A. the basal body.
B. the motor protein ciliary dynein.
C. the fluid that surrounds the flagellum.
D. actin and myosin.

Answer 1

The bending of microtubules in a eukaryotic flagellum is driven by the motor protein ciliary dynein. The correct answer is B).

Step-by-step explanation:

The bending of microtubules in a eukaryotic flagellum is driven by the motor protein ciliary dynein (option B).

The motor protein dynein enables axonemes (the core structural component of cilia and flagella) to bend. Dynein arms attached to the A tubules of the outer doublets walk along the B tubules of the adjacent doublet, causing the microtubules to slide past one another and resulting in the bending motion of the flagellum or cilium.

Actin and myosin (option D) are not involved in the bending of microtubules in a eukaryotic flagellum.