Plasma Membranes (2)

Question 1

Role of proteins in cell membranes

Answer 1

Proteins form channel and carrier proteins which transport compounds in and out of cells. They form enzymes.

Question 2

Compare diffusion and active transport

Answer 2

Both move molecules through phospholipid bilayer.
In both, molecules can go through proteins.
Diffusion is passive whereas active transport is active
Diffusion occurs down a concentration gradient active transport occurs against concentration gradient