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Membrane Fluidity and Component Movement
Grade Level
AP Biology
APB.131 Membrane Fluidity and Component Movement
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A researcher uses a membrane-permeable fluorescent dye that labels many proteins inside the cell as well as membrane proteins. Which added observation would most specifically support lateral movement of plasma membrane components?
A
All cytosolic proteins become brighter after the plasma membrane is bleached.
B
The dye labels DNA more strongly than it labels the plasma membrane.
C
A membrane-bound label recovers within a bleached plasma membrane patch while cytosolic fluorescence is excluded from the analysis.
D
The whole cell becomes uniformly fluorescent before any membrane region is measured.
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