C, a collection of photosynthetic protons arranged in a thylakoid membrane.
Explanation:
Cell membranes are selectively permeable. Some solutes cross the membrane freely, some cross with assistance, and others do not cross at all. A few lipophilic substances move freely across the cell membrane by passive diffusion. ... Large molecules do not cross intact cell membranes, except in certain special cases.
Lipids contain more energy than carbohydrates because they contain more carbon to hydrogen bonds.