The _________ region(s) of the protein will associate with the _________ fatty acid tails of membrane phospholipids.

Drawn below is a schematic of a transmembrane protein. Extracellular Cell membrane Cytosolic side (a) From the list below, select the amino acid(s) that might by more common in the extracellular domain of this membrane protein and whose side- chain can form hydrogen bonds with the surrounding water molecules. Explain why you selected this option(s). Lysine Serine Phenylalanine Methionine (b) From the list below, select the amino acid(s) that would likely be found in the transmembrane/ membrane spanning domain of this protein and whose side- chain interacts with the lipid bilayer. Lysine Serine Phenylalanine Methionine

How many calories of energy/osmole would need to be expended in order to concentrate a solute 75-fold (i.e. generate a gradient with 75 times as much solute on one side of the membrane than the other side).

True or False? The selective permeability of the plasma membrane allows all substances to pass through the membrane, ensuring that the inside of the cell is in constant interaction with its external environment.