Question

Dow of molecules in active transport

Answer 1

In active transport, molecules move against their concentration gradient, requiring the input of energy to proceed. This is in contrast to passive transport, where molecules move along their concentration gradient without the need for energy input.

The number of molecules involved in active transport can vary depending on the specific transport process and the molecule being transported. In general, active transport involves the movement of individual molecules or small groups of molecules across cell membranes or within cells.

For example, in the sodium-potassium pump, a process of active transport, three sodium ions are pumped out of the cell while two potassium ions are pumped in for each ATP molecule hydrolyzed. This process is responsible for maintaining the ion concentration gradients across the cell membrane, which is essential for various cellular functions.

Similarly, in the process of endocytosis, molecules or particles are actively taken up by cells through the inward folding of the cell membrane. This process can involve the uptake of multiple molecules or particles, depending on the size and nature of the material being transported.

Overall, the number of molecules involved in active transport is highly variable and depends on the specific transport mechanism and the requirements of the cell or organism.