Question

Which of the following is not required for osmosis to occur?

concentration gradient
water
cellular energy
selectively permeable membrane

Answer 1

Osmosis is the movement of water across a semipermeable membrane driven by a concentration gradient and does not require cellular energy.

Step-by-step explanation:

Osmosis is the passive transport of water through a semipermeable membrane according to the concentration gradient of water across the membrane. For osmosis to occur, there must be water, a concentration gradient, and a selectively permeable membrane. However, cellular energy is not required, as osmosis is driven by the inherent kinetic energy of the water molecules moving down their concentration gradient.

Answer 2

Cellular energy

Step-by-step explanation:

Osmosis is the movement of water from a less concentrated to more concentrated solution across a semi-permeable membrane. Cellular energy is not required in osmosis because it is a passive process. Osmosis is technically more or less the selective diffusion of water molecules across a membrane that selectively locks out other larger molecule like ions. Water will, therefore, move from the solution where there are more water molecules to the solution with fewer water molecules.