Define Uniport, Symport and Antiport.

Question:
Define Uniport, Symport and Antiport. Do they require energy?

Solution:

1. Uniport: When a single substance moves in a single direction across a cell membrane, it is called uniport.

2. Antiport: When two substances move in the opposite direction across a cell membrane, it is called antiport.

3. Symport: When two substances move in the same direction across a cell membrane, it is called symport

They do not need energy directly.