Flagella and Cilia Bend or Move, Imparting Mobility to Cells

Multiple Choice

Flagella and cilia bend or move, imparting mobility to cells. How do these structures move?

A) Two microtubules at the core of the structure serve as motor proteins.
B) Dynein is a motor protein that hydrolyzes ATP and is responsible for movement of the cilium or flagellum.
C) Axonemes are structured such that movement is constant.
D) The basal body at the base of the structure hydrolyzes ATP, causing a conformational change that results in movement of the cilium or flagellum.