Question

unit 1 cumulative test (characteristics of life, biomolecules, cell structure and transport) 2025
38 of 40
possible points: 0.26
solution a
solution b
sugar
molecule
(solute)
selectively
permeable
membrane
solution is hypertonic; solution is hypotonic. over time, the water level on side __ will go down.

Explanation:

To solve this problem, we analyze the osmosis process based on solute concentration:

Step 1: Identify Hypertonic and Hypotonic Solutions

A hypertonic solution has a higher solute (sugar) concentration, while a hypotonic solution has a lower solute concentration. From the diagram, Solution B has more sugar molecules (red dots) than Solution A. Thus:

• Solution B is hypertonic (higher solute).
• Solution A is hypotonic (lower solute).

Step 2: Predict Water Movement (Osmosis)

Water moves across a selectively permeable membrane from a hypotonic solution (low solute) to a hypertonic solution (high solute) (to balance solute concentrations). So:

• Water moves from Solution A (hypotonic) to Solution B (hypertonic).

Step 3: Determine Water Level Change

As water leaves Solution A (moves to Solution B), the water level in Solution A will decrease (go down).

Answer:

• Hypertonic: Solution B
• Hypotonic: Solution A
• Water level goes down in: Solution A