The diagram in Figure 12–9 shows a transporter that mediates the passive transfer of a solute down its concentration gradient across the membrane. How would you need to change the diagram to  the transporter into a pump that moves the solute up its concentration gradient by hydrolyzing ATP? Explain the need for each of the steps in your new illustration.

Figure 12–9

Transcribed Image Text:

cell membrane glucose glucose transporter glucose-binding site EXTRACELLULAR SPACE CYTOSOL concentration gradient