Which term best characterizes the motility of a two-headed motor such as kinesin
ID: 7845 • Letter: W
Question
Which term best characterizes the motility of a two-headed motor such as kinesin or dynein?A running- because the motors move fast in a cell in a motion similar to a person running
B walking- because the motors always have to keep at least one contact with the microtubule
similar to how a person walks
C hopping- because the best motility in a cell happens when a motor detaches both heads and
hops to a new spot along the microtubule.
D gliding- because two headed motors never pick up their heads- the heads just glide along the microtubule
Explanation / Answer
The answer should be B, walking. The motors must keep at least one contact with the microtubule. They can do this in either an inchworm fashion in which one head is always in front or a head over head fashion (walking) which alternates which head leads.
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