AP Biology Water Potential Quiz
Authored by Katrina J Mcgrady
Biology
9th - 12th Grade
NGSS covered
Used 680+ times
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This quiz covers water potential and osmosis, fundamental concepts in Advanced Placement Biology that correspond to grades 11-12. The assessment evaluates students' understanding of water movement across cell membranes through both quantitative and qualitative approaches. Students must master the water potential equation (Ψ = ΨP + ΨS), perform calculations using solute potential (-iCRT), and predict water movement based on concentration gradients. The core concepts include distinguishing between solute potential and pressure potential, understanding that water moves from areas of higher water potential to lower water potential, and recognizing the relationship between tonicity and cellular responses. Students need strong mathematical skills to solve multi-step problems involving the ideal gas law components, as well as conceptual understanding of osmosis, diffusion, and membrane permeability to analyze various scenarios involving plant and animal cells in different solution environments. Created by Katrina J Mcgrady, a Biology teacher in the US who teaches grades 9-12. This comprehensive assessment serves multiple instructional purposes, from formative evaluation during initial concept introduction to summative review before AP examinations. Teachers can utilize individual sections as targeted warm-ups focusing on either mathematical applications or conceptual understanding, assign the complete quiz as homework to reinforce laboratory observations, or implement it as a review tool before unit assessments. The quiz effectively bridges theoretical calculations with practical applications, helping students connect mathematical models to biological phenomena they observe in laboratory settings with plant cells, animal cells, and various solution concentrations. This assessment aligns with AP Biology Learning Objectives 2.12 and 2.13, which focus on predicting the effects of changes in free water concentration and explaining how biological systems maintain homeostasis through osmoregulation.
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28 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the following equation used to find: -iCRT
water potential
solute potential
cell potential
electrical potential
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
In an open container, the pressure potential is _____________.
1
2
3
0
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
For a cell in an open container, the solute potential is _____________ the water potential.
less than
greater than
equal to
not related to
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If a plant cell’s ΨP=3.2 bars and its ΨS=-4.3 bars, what is the resulting Ψ?
-1.1
1.1
7.5
13.76
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The plant cell with a Ψ of -1.1 is placed in a beaker of sugar water with ΨS of -2.3 bars. In which direction will the net flow of water be?
inside the cell
outside the cell
no direction because the cell is at equilibrium
There is not enough information to answer this question.
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The value for Ψ in root tissue was found to be -1.2 bars. If you place the root tissue in a 0.1 M solution of sucrose at 20°C in an open beaker, what is the Ψ of the solution? (R=0.0831 liter-bars/mole K, K=C +273)
-2.43
2.43
1.43
-0.33
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The value for Ψ in root tissue was found to be -1.2 bars. If you place the root tissue in a 0.1 M solution of sucrose at 20°C in an open beaker, what is the Ψ of the solution, and in which direction would the net flow of water be? (R=0.0831 liter-bars/mole K, K=C +273)
inside the roots
outside the roots
The roots are at equilibrium with the solution.
There is not enough information to calculate the solution to this problem.
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