Biology

The correct answer is: D.The transport proteins change shape to push the molecules through the membrane of the cell.

In active transport, protein pumps in the cell membrane use energy (typically from ATP) to move molecules across the membrane against their concentration gradient (from low to high concentration). These protein pumps work by changing shape to carry the molecules through the membrane. This process requires energy to drive the conformational change in the pump that allows the molecules to be transported.

The other options are incorrect:

A.The molecules are sucked in au...