None of the above. In exocytosis, the membrane of the secretory vesicle fuses with the plasma membrane d. Proteins that function within the cytosol, such as the cytoskeleton proteins, are synthesized on the rough ER and enter the endoplasmic reticulum. Some proteins get oligosaccharides added to them in the endoplasmic reticulum. Proteins that get secreted typically are processed through the rough endoplasmic reticulum, the golgi apparatus, then carried by vesicles to the plasma membrane.
Oligosaccharides are polymers of sugars.
A red blood cell placed in a concentrated salt solution will swell and lyse. The plasma membrane is a bilayer, with the hydrophobic portion of the phospholipids forming the interior part of the bilayer. The hydrophilic portion of a transmembrane protein associates with the hydrophobic portion of the phospholipids. Some proteins of the plasma membrane function serve as receptor proteins, sensing the external environment of the cell. About 3.3x b.