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Product 14215

By: The Flinn Staff

In the Membrane Properties Laboratory Kit for biology and life science, explore potential membrane damage by exposing beet cells to four different concentrations of ethyl alcohol.

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A cell membrane’s ability to adjust to varying conditions is truly remarkable! Is there a limit to the amount of stress cell’s plasma membrane experiences before the cell becomes vulnerable? Students explore potential membrane damage by exposing beet cells to four different concentrations of ethyl alcohol. Equal concentrations of ethyl alcohol and n-propyl alcohol are also compared to determine the effect of molecule size on membrane damage. Solutions are transferred to cuvets and the absorbance of the solutions is measured so students can easily correlate the amount of membrane damage to the concentration of alcohol.

Kit includes enough materials for 15 groups of students. Fresh beets and a colorimeter or spectrophotometer are required but not included.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Developing and using models
Planning and carrying out investigations
Analyzing and interpreting data
Using mathematics and computational thinking

Disciplinary Core Ideas

HS-LS1.A: Structure and Function

Crosscutting Concepts

Cause and effect
Systems and system models
Structure and function
Stability and change

Performance Expectations

HS-LS1-3. Plan and conduct an investigation to provide evidence that feedback mechanisms maintain homeostasis.