Praxis 5005 Practice Test Practice Question
When onion cells are placed in a 5% table salt solution, the plasma membranes shrink away from the cell walls. This results from the net movement of
Correct Answer: B
Rationale: When onion cells are placed in a 5% table salt solution, water moves out of the cells to balance the higher concentration of salt outside. This process, known as osmosis, causes the plasma membranes to shrink away from the cell walls, resulting in plasmolysis.
Option A is incorrect because water is not entering the cells; rather, it is leaving them.
Options C and D are also incorrect, as they suggest movement of salt, which does not significantly occur in this scenario. The primary factor affecting the cell is the movement of water, leading to the observed shrinkage.
Unlock All Questions
Subscribe to Premium for full access to all practice questions, detailed rationales, and performance tracking.
Subscribe Now