Question

What do the protein pumps involve?

Answer 1

Protein pumps:

These are specific proteins in the cell membrane that facilitate the transport of ions and other biochemical molecules across the plasma membrane.

1. The transport proteins in the plasma membrane pass solutes like amino acids, small ions, and monosaccharides.
2. These proteins also take part in active transport also known as ionic pumps.
3. This transport leads to the release of energy in the form of ATP which is then used to alter its shape and release it.
4. Some pumps are specific for each molecule that has to be transported.
5. In the splitting of the ATP, the protein pumps act as catalysts and hence are known as ATPase enzymes.
6. The sodium-potassium pump moves sodium actively out of the cell and potassium into cells.
7. These pumps are seen in the membranes of virtually every cell and are essential in transmitting nerve impulses and in the contraction of muscles.