Question

question 4 0.5 pts what is the initial source of energy to drive proton transport against their concentration gradient during active transport? atp hydrolysis providing free energy phosphorylation of the transporter protein. the movement of protons down their concentration gradient. the concentration of protons inside the cell.

Explanation:

Active transport requires energy to move substances against their concentration gradient. ATP hydrolysis is a common source of energy for such processes. It releases free - energy that can be used to power the transport of protons against their concentration gradient. Phosphorylation of the transporter protein is a consequence of ATP hydrolysis in some cases, not the initial energy source. Movement of protons down their concentration gradient is passive transport, not active. The proton concentration inside the cell is related to the result of transport, not the energy source for active transport.

Answer:

A. ATP hydrolysis providing free energy