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
In osmosis across a semipermeable membrane, which direction does water move?
A
Only from the side with higher hydrostatic pressure to the side with lower hydrostatic pressure, independent of solute concentration
B
From the side with lower solute concentration (higher water potential) to the side with higher solute concentration (lower water potential)
C
From the side with higher water concentration to the side with lower water concentration, regardless of solute concentration
D
From the side with higher solute concentration to the side with lower solute concentration
Verified step by step guidance1
Understand that osmosis is the movement of water across a semipermeable membrane from an area of higher water potential to an area of lower water potential.
Recognize that water potential is influenced by solute concentration: higher solute concentration lowers water potential because solutes bind water molecules, reducing free water available to move.
Identify that water moves from the side with lower solute concentration (which corresponds to higher water potential) to the side with higher solute concentration (which corresponds to lower water potential).
Note that hydrostatic pressure can affect water movement, but in osmosis, the primary driving force is the difference in solute concentration and resulting water potential, not just hydrostatic pressure alone.
Conclude that the correct direction of water movement in osmosis is from the side with lower solute concentration (higher water potential) to the side with higher solute concentration (lower water potential).
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