Examlex
Which of the following membrane activities does NOT require the expenditure of energy by the cell?
Potential Energy
The energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.
Kinetic Energy
The energy that an object possesses due to its motion, directly proportional to the mass of the object and the square of its velocity.
Substrate
A surface or material on or from which an organism lives, grows, or obtains its nourishment.
Phosphate Group
A functional group consisting of a phosphorus atom bonded to four oxygen atoms, important in energy transfer.
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