Multiple Choice
If a plant cell loses water at the same rate that it takes in water, what type of solution is it in?
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6. The Membrane
Osmosis
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Which of the following best describes the process of osmosis as depicted in biological systems?
A
The movement of water molecules from an area of low solute concentration to an area of high solute concentration across a selectively permeable membrane.
B
The movement of solute molecules from an area of high concentration to an area of low concentration through a membrane.
C
The active transport of ions against their concentration gradient using ATP.
D
The bulk movement of substances into a cell via vesicles.
Verified step by step guidance1
Step 1: Begin by understanding the concept of osmosis. Osmosis is a specific type of passive transport that involves the movement of water molecules across a selectively permeable membrane.
Step 2: Recall the key principle of osmosis: water molecules move from an area of low solute concentration (high water concentration) to an area of high solute concentration (low water concentration). This movement occurs to balance the solute concentrations on both sides of the membrane.
Step 3: Compare the given options to the definition of osmosis. Eliminate options that describe processes unrelated to the movement of water molecules, such as the movement of solutes, active transport using ATP, or bulk transport via vesicles.
Step 4: Focus on the option that correctly describes the movement of water molecules across a selectively permeable membrane, driven by differences in solute concentration.
Step 5: Confirm that the correct answer aligns with the biological definition of osmosis, emphasizing the passive nature of the process and the role of the selectively permeable membrane.
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