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Aim: To find out how the permeability of cell membranes is affected by different temperatures. Objective: The objective of this experiment is to examine how a change in temperature will affect the permeability cell membranes. In this experiment, beetroots will be used to test out the aim. Background information: Beetroot cells, like all other cells, have a cell membrane. The cell surface membrane is the boundary between the cytoplasm in the cell and the environment, so it has the important job of controlling the movement of substances in and out of the cell. The cell surface membrane is composed of many components one of which is phospholipids. A phospholipid is composed of 2 main parts, a hydrophobic head which is attracted to water and a hydrophobic tail which is repelled by water but mixes readily with fat. The hydrophilic heads point towards both inwards towards the cell cytoplasm and outwards towards the aqueous...

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