Which set of atoms can be found in ALL carbon-based molecule? 1.oxygen, hydrogen, phosphate, carbon
2.hydrogen, carbon, oxygen
3.nitrogen, carbon, hydrogen
4.carbon, nitrogen, hydrogen and an R-group.

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer