How do we know that membrane phospholipids regularly intermingle and move laterally, but rarely flip from one side of the phospholipid bilayer to the other?

Which of the following statements are TRUE about the phospholipid bilayer? Select all that apply.         Integral proteins have at least one part touching the inner 'tails' of the membrane.     Peripheral proteins span the entire membrane.     Cholesterol can be used to make the membrane more OR less fluid, depending on the temperature.     Glycolipids and glycoproteins face the inside of the cell.

Identify basic structure of the 8 types of membrane proteins shown below Understand how primary structure (e.g., regional hydrophobicity and hydrophilicity) allows proper membrane interaction/association. Compare/contrast the degree to which proteins are attached to membranes. Which have more lateral movement? Diversity of attachment and lateral movement allows efficient function. Understand where glycosylated lipids and proteins are found and what general functions they serve. Know the role/significance of cysteine disulfide bonds. On which side of the plasma membrane do they generally occur? Why? lipid bilayer A La s *****P & de www CYTOSOL COOH NH₂ cccccce 6

I think it works by freezing the bilayer of the membrane and then hitting it sharply with a diamond knife. The sharp hit creates a fracture in the membrane and usually that fracture follows the plane between the two layers of the membrane lipid.