Multiple Choice
Which of the following is an example of osmosis?
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9. Transport Across Membranes
Passive Transport: Diffusion and Osmosis
Multiple Choice
Which of the following is the best definition of osmosis?
A
The net movement of molecules from a region of higher concentration to a region of lower concentration regardless of membrane permeability
B
The movement of any solute across a membrane from low concentration to high concentration using ATP
C
The movement of water across a membrane from a region of higher solute concentration to a region of lower solute concentration
D
The net movement of water across a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration
Verified step by step guidance1
Step 1: Understand that osmosis specifically refers to the movement of water molecules, not solutes, across a membrane.
Step 2: Recognize that osmosis occurs across a selectively permeable membrane, which allows water to pass but restricts many solutes.
Step 3: Identify the direction of water movement in osmosis: water moves from an area of lower solute concentration (higher water concentration) to an area of higher solute concentration (lower water concentration).
Step 4: Differentiate osmosis from diffusion of solutes, which involves movement of solute molecules and may require energy (active transport) or not (passive diffusion).
Step 5: Conclude that the best definition of osmosis is the net movement of water across a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration.
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