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Category: Science
Word Count: 688
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Investigating Membrane Permeability
TITLE:
Membrane permeability (1)

INTRODUCTION:
The cells of certain plants have various kinds of pigment dissolved in the sap of their cell vacuole. The vacuole is enclosed by a membrane, the tonoplast, which is freely permeable to water but is impermeable to the pigment. Normally the pigment cannot escape unless the membrane or the entire cell is damaged.
Since protein is one of the components of cell membranes, any treatment which denatures protein will also cause the pigment to leak o

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