Mediated transport of polar molecules and ions across the plasma membrane utilizes a(n) _____ carrier that binds to the substance and causes a conformational change to allow its movement across the membrane.

Question

Quizplus · Accepted Answer

Mediated transport of polar molecules and ions across the plasma membrane utilizes a protein carrier that binds to the substance and causes a conformational change to allow its movement across the membrane. Porins are channel proteins that allow passive movement of small polar molecules. Lipids are the structural component of the membrane and do not actively participate in transport. Enzymes are involved in catalyzing reactions within the cell but not in transport across the membrane.

Mediated Transport of Polar Molecules and Ions Across the Plasma