Multiple Choice
Which of the following statements about osmosis is false?
33
views
9. Transport Across Membranes
Passive Transport: Diffusion and Osmosis
Multiple Choice
Which statement best describes how water moves during osmosis across a selectively permeable membrane?
A
Water moves only through phospholipids in the membrane and cannot pass through protein channels.
B
Water moves from a region of lower solute concentration (higher water potential) to a region of higher solute concentration (lower water potential).
C
Water moves from a region of higher solute concentration to a region of lower solute concentration until solute concentrations are equal.
D
Water is actively pumped across the membrane against its concentration gradient using ATP.
Verified step by step guidance1
Understand that osmosis is the passive movement of water molecules across a selectively permeable membrane.
Recall that water moves from an area of higher water potential (which corresponds to lower solute concentration) to an area of lower water potential (which corresponds to higher solute concentration).
Recognize that water does not require energy (ATP) to move during osmosis, so active transport is not involved.
Know that water can move through protein channels called aquaporins as well as through the phospholipid bilayer, but the key factor is the direction of movement driven by solute concentration differences.
Conclude that the best description is: water moves from a region of lower solute concentration (higher water potential) to a region of higher solute concentration (lower water potential).
Related Videos
Related Practice
