HELP! The protein, lipid, and carbohydrate compositions of the cytoplasmic and extracellular sides of membranes are different from one another. Why is this the case. 1. Some membrane components are synthesized outside of the cell, while others are synthesized in the cytosol.

2. The two sides of a cell membrane face different environments and carry out different functions.

3. The molecular composition of the inner and outer layers of the cell membrane is determined by genes.

4. Proteins only function on the cytoplasmic side of the cell membrane, which results in a asymmetry across the membrane.