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Kinesin is a motor protein that moves components around in a cell. It is powered by...

Kinesin is a motor protein that moves components around in a cell. It is powered by burning ATP molecules. Assume that burning a single ATP molecule provides 0.8 x 10-19 J to the kinesin.

With this in mind, how many ATP molecules will a kinesin need to burn in order to move a vesicle at a constant velocity for a total distance of 1 micrometer (or 1 x 10-6 m) assuming a drag force on the vesicle of 6 x 10-12 N? You can also assume that the force the kinesin exerts, the drag force, and the displacement of the vesicle are all in the same direction.

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Answer #1

Drag force

Displacement

Work done by the force

This work is done by kinesin, which is provided by 'burning' ATP molecules.

Each ATP molecule provides upon burning.

Hence the number of ATP molecules that must be burnt is

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