Question

the next thing to ask yourself about a membrane protein you are interested in is this: are regions that are interacting with water versus the lipid interior of the membrane dominated by 1) r - groups that have partial or full charges, or 2) r - groups that are nonpolar? drag and drop the appropriate answer to match it with each region (a - e).

Explanation:

Regions interacting with water (extracellular or intracellular environments) will have polar and charged R - groups due to water's polar nature. Regions within the lipid - interior of the membrane will have nonpolar R - groups as lipids are nonpolar. Region A and E are on the outer and inner surfaces of the membrane respectively, interacting with water, so they have polar and charged R - groups. Region B, C and D are within the lipid - bilayer, so they have nonpolar R - groups.

Answer:

A. Polar and charged R - groups
B. Nonpolar R - groups
C. Nonpolar R - groups
D. Nonpolar R - groups
E. Polar and charged R - groups