The bending movements of cilia and flagella
A) are accomplished by alternate solation and gelation of the cytosol.
B) involve the alternate assembly and disassembly of actin filaments.
C) are produced by the sliding of adjacent microtubule doublets past each other.
D) are important in providing motility for many organisms but are not of any use in humans.
E) none of these answers.

Question

Quizplus · Accepted Answer

The bending movements of cilia and flagella are produced by the sliding of adjacent microtubule doublets past each other, which is powered by dynein motor proteins. This sliding is facilitated by the ATP-driven movement of dynein arms attached to one microtubule doublet, which interacts with the adjacent doublet to produce a bending or twisting motion.

The Bending Movements of Cilia and Flagella