question_answer

  What    is    active    transport?   Differentiate between active and     passive transport.                             

Answer:

                  The process in which the molecules are       moved uphill against the concentration gradient. Active transport always involves the expenditure of energy because the materials are pumped against the concentration gradient.                

Active transport	Passive transport
1. It involves movement of molecules against the concentration gradient.	1. It involves movement of molecules along the concentration gradient
2. It requires energy in the form of ATP molecules.	2. No energy is required.
3. It is a rapid movement	3. It is a slow movement.
4. Movement of large molecules	4. Small molecules or water molecules only are transported passively