As Biology Coursework Beetroot Experiment

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3 Check the temperature of the water baths regularly and top up with boiling water or add extra ice if the temperature has changed.

SAFETY: Take care carrying scalpels or knives around the laboratory. Preparation a Cut bores of beetroot with a size 4 cork borer and soak overnight in a beaker of distilled water (Note 1).

2 Note: Beetroot juice will stain clothing (and, temporarily, skin) but is not hazardous.

Students may wish to wear labcoats to protect their clothing from stains.

Their non-polar tails form a barrier to most water soluble substances.

Membrane proteins serves as channels for transport of metabolites, some act as enzymes or carriers, while some are receptors. cuvette *My experiment was controlled by using deionized water, in order to get 100% transmittance when calibrated.The temperature of which the solution is heated in can be controlled by using the same 80°C water bath for all the trials, and using the thermometer (±0.05°C) to ensure that the water bath is constantly at 80°C.The volume of deionized water should all be at 8ml, this can be controlled by using a measuring cylinder (±0.2ml) and a dropper to accurately measure out the correct amount.e Remove the beetroot cores from the distilled water and blot gently on a paper towel.Decide whether forceps or mounted needles are best for handling the tissue and what damage this might cause to the cores.Cut each core into 2 cm sections until you have enough for one core for each temperature of water bath that you will be using.Put your 2 cm sections into a test tube with plenty of distilled water.Arrange the tubes in order of temperature of the water bath.Describe any relationship between the amount of pigment released from the beetroot and the temperature. The pigments cannot pass through membranes, but can pass through the cellulose cell walls if the membranes are disrupted – by heat (for example cooking), by surfactants, or after a long period pickled in vinegar.Lastly carbohydrate molecules of the membrane are relatively short-chain polysaccharides, which has multiple functions, for example, cell-cell recognition and acting as receptor sites for chemical signals. Control of Variables: The diameter of the beetroot core can be kept same using the same sized core borer of 8mm each time.The plasma membrane is a permeable diameter of beetroot core (8mm) 2. temperature of which beetroot is heated in (80°C) 4. The length of the beetroot core can be kept constant by measuring the lengths with vernier calipers (±0.001cm) and using a knife, cutting them to same lengths of 22mm.


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