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Activity 2.7: Why does Colour Leak Out of Cooked Beetroot? Aim: To use beetroot to examine the effect of temperature on cell membranes and relate the effect observed to membrane structure. Hypothesis: As the temperature increases, more pigment will leak from the beetroot into the water. Diagram showing the location of betalins: Method: Look at Activity Sheet 2.7 for details. Alterations were made to the method at steps 2 and 3. The beetroot slices were not placed in the distilled water overnight. Instead they were washed in distilled water and dried using paper towels. Hence step 3 will be changed from the next day, as the experiment will continue to take place on the same day. Risk Assessment/Safety/Ethical Issues: * Wear lab coats & gloves to avoid colour going onto clothes & hands. * Be careful when cutting beetroot with knife as you may get hurt. * Keep away from water-baths as hot...

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