Solutions A and B are separated by a selectively permeable barrier. Over time, the level of fluid on side A increases. Which solution initially had the higher concentration of solute?

A molecule that blocks the ion channels lining integral proteins in the plasma membrane would interfere with

(a) Cell recognition

(b) The movement of lipid-soluble molecules

(c) Producing changes in the electrical charges across a plasma membrane

(d) The ability of protein hormones to stimulate the cell

(e) The cell's ability to divide

What is the benefit of having some of the cellular organelles enclosed by a membrane similar to the plasma membrane?