Kinesin 1 is highly processive motor, taking more than 100 steps (covering 1 ?m 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.


Answer: B

Biology & Microbiology

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