In active transport, ATP energy is used in the phosphorylation-dephosphorylation cycle of the carrier.

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Quizplus · Accepted Answer

Active transport involves the use of ATP energy to move molecules or ions against their concentration gradient. This energy is used in the phosphorylation-dephosphorylation cycle of the carrier protein. The carrier protein is typically phosphorylated by ATP, which allows it to bind to the molecule to be transported. Once the carrier has bound to the molecule, it undergoes dephosphorylation, which changes its shape and allows the molecule to be released on the other side of the membrane. This cycle of phosphorylation and dephosphorylation requires ATP energy.

In Active Transport, ATP Energy Is Used in the Phosphorylation-Dephosphorylation