KA 2 1.3.1 Test (CST): Cell Biology Unit Test
A scientist designs an experiment in which the movement of polar molecules
through a cell membrane is tested. He sets up the following two experiments
in order to collect data on cell membrane permeability. What question is the
scientist most likely trying to answer by conducting this experiment?
A. How do transport proteins affect the diffusion of polar molecules
across a cell membran
B. Are polar molecules able to diffuse across a cell membrane at a
greater rate than proteins?
C. What role do polar molecules play in the diffusion of proteins across a cell membrane?
D. How do Polar Molecules differ across a cell membrane?