Question

If a poison stopped the production of ATP, in the cell which of the following processes would stop?

Multiple Choice

• Osmosis and facilitated diffusion

• All of the above

• The movement of Na+ into the cell

• The movement of K+ into the cell

Answer 1

Answer: The movement of K+ into the cell.

Explanation:

Osmosis involves the movement of solvent molecules from a region of higher concentration to the region of lower concentration through a semi-permeable membrane. Facilitated diffusion involve the spontaneous transport of molecules through biological membranes using transmembrane proteins. Both osmosis and facilitated diffusion are type of passive transport which does not require ATP.

The sodium-potassium pump is a type of active transport in which molecules or ions are transported from region of higher concentration to region of lower concentration. The sodium-potassium pump, transports Na+ out of the cell and K+ ions into the cell. Since, it is an active transport ions the energy is provided by ATP molecule. The movement of the K+ into the cell will stop if ATP is not produced in the cell.