Which of the following explains the role enzymes play in the process of
digestion?
a. they assure that digestion occurs within hours instead of days
b. they improve the peristaltic movement of the intestines during digestion.
c. they increase the amount of acid released from the stomach.
d. they prevent lipids from being absorbed into the blood stream

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?