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Purpose: To investigate the effect of alcohol concentration on membrane permeability.


1. Use a size 4 cork borer to cut cylinders of fresh beetroot tissue. Place on a tile and
cut into 1cm wide discs.
2. Place the slices in a beaker of distilled water. Leave…

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As the number of potato disks increases the amount of oxygen also increases'
therefore suggesting that enzyme concentration is directly proportional to rate of
reaction. The more enzyme molecules there are in a solution, the more likely a
substrate molecule is to collide with one and form an enzyme-substrate complex.


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