The cell surrounded by a semi-permeable plasma membrane. Substance can move in and out of the cell through the plasma membrane.
a) Explain the structure of the plasma membrane that makes it semi-permeable.
b) With the help of specific examples, describe how simple diffusion and facilitated diffusion occur in our body.
c) With the help of a diagram, explain what happens to plant cells when they are placed in the following sucrose solutions:
(i) 5% sucrose solution.
(ii) 30% sucrose solution.
(iii) 0.1% sucrose solution.