Which of the following statements about osmosis is correct?

• A. Osmosis requires energy input in the form of ATP.
• B. Osmosis involves the movement of solute particles across a semipermeable membrane.
• C. Osmosis is the movement of water molecules from a region of lower solute concentration to a region of higher solute concentration through a semipermeable membrane.
• D. Osmosis only occurs in non-aqueous solutions.

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the definition of osmosis. Osmosis is the movement of solvent molecules, typically water, across a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration.
2. Step 2: Recognize that osmosis does not require energy input (ATP) because it is a passive transport process driven by concentration gradients.
3. Step 3: Note that osmosis involves the movement of solvent (water), not solute particles, across the membrane.
4. Step 4: Confirm that osmosis occurs in aqueous solutions, as water is the solvent moving through the membrane.
5. Step 5: Based on these points, identify the correct statement as the one describing osmosis as the movement of water molecules from lower to higher solute concentration through a semipermeable membrane.