STPM Biology - chapter 1: Reision essay question 35

35.

a)      Define the term osmosis.

Osmosis is the diffusion of water though a membrane from a region with high concentration to a region with a lower concentration of water.

b)      What word describes a plant cell which has gained a maximum amount of water?

The word describes a plant cell which has gained a maximum amount of water is turgid.

c)       What word is used to describe a cell where the cytoplasm has pulled away from the cell wall?

The word used to describe a cell where the cytoplasm has pulled away from the cell wall is plasmolysis.

d)      In what way is active transport different from osmosis?

Active Transport	Osmosis
It requires energy.	It does not require energy.
It occurs against the concentration gradient.	It occurs down the concentration gradient.
It is the movement of molecules and ions.	It is the movement of water only.

By Wei Kee