Question

Active transport of molecules take place

• A. Along the concentration gradient
• B. Along the electric gradient
• C. Along the pressure gradient
• D. Against the concentration gradient

Answer 1

The correct option is D Against the concentration gradient

Active transport mechanism require the use of cell's energy in the form of ATP. In this mechanism substances move into the cell against its concentration gradient. For this, the concentration of substances inside the cell must be greater than its concentration in the extracellular fluid. The cell must use energy to move substances.

So, here option d, active transport of molecules take place against the concentrate gradient is the correct answer.