Kinesin 1 is highly processive motor,taking more than 100 steps (covering 1 μm along a microtubule)before dissociating,primarily because
A)it hydrolyzes ATP more rapidly than other motors.
B)one of its two heads is always attached in it hand-over-hand mechanism.
C)light chains at its nonmotor end attach to cargo vesicles.
D)its efficiency of converting ATP hydrolysis energy to useful work is 60-70%.
E)All are required for processivity.

Question

Quizplus · Accepted Answer

Kinesin 1's high processivity is primarily due to its "hand-over-hand" mechanism, where one of its two heads is always attached to the microtubule, ensuring continuous movement and preventing dissociation. This mechanism allows it to take many steps before detaching from the microtubule.

Kinesin 1 Is Highly Processive Motor,taking More Than 100 Steps