Question

Which of the following features is not shared by microtubule and microfilament molecular motors?

A) coupling ATP hydrolysis to change shape and attachment of the motor to its associated cytoskeletal filament
B) retention of bound ADP and Pi products immediately after ATP hydrolysis
C) cycles of ATP hydrolysis, release of ADP and Pi, and binding of new ATP as they undergo a crossbridge cycle of force production on a filament
D) similar structural features that transduce changes in the motor protein shape into movement
E) The motors share all these features.

Answer 1

The feature not shared by microtubule and microfilament motors is the structural feature that transduces energy changes into movement, as these motors have differing structures unique to their function and the filaments they interact with.

Step-by-step explanation:

The feature not shared by microtubule and microfilament molecular motors is related to their structural features and how these transduce changes in motor protein shape into movement. Although both types of motor proteins use ATP hydrolysis to power movements and undergo cycles of ATP hydrolysis followed by release of ADP and Pi with the subsequent binding of new ATP, their structural features are distinct. Microtubule motors such as dynein and kinesin have different structural domains than microfilament motors like myosin, leading to differences in how these structures transduce chemical energy into mechanical work.