As Biology Coursework Beetroot Experiment

d Label a set of test tubes (one for each temperature of water bath) with the temperature and your initials.Add exactly 5 cm of distilled water to each test tube and place the tubes, one in each water bath, for 5 minutes to equilibrate to the water bath temperature.Beetroot cores, cut with a size 4 cork borer and soaked in distilled water overnight (Note 1) Thermometers, 1 for each water bath Kettle, to provide boiling water for the water baths Ice bath (a beaker of water surrounded by ice) Scalpel, 1, or sharp vegetable knife Tile, 1 Forceps or mounted needles to ‘handle’ beetroot cores Ruler, up to 15 cm, 1 Distilled water, in wash bottle Measuring cylinder, 10 cm 1 Beetroot must be raw, not cooked.

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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.

Many cookbooks suggest that beetroot should be cooked with their outer skins on, and with a minimum amount trimmed from the top (by the leaves) and tail (by the taproot) to reduce the release of beet colour leaking into the water.

This procedure lends itself to detailed evaluation, and provides an opportunity to discuss how you would like students to write up a practical.

The pigment from any cells that have been cut by the cork borer will leak into the water.

Rinse away any pigmented water in the morning and replace with fresh water.

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.

Investigating Effects of duration of heating on permeability of beetroot cell membrane Introduction: Cell membranes contain many different types of molecules which have different roles in the overall structure of the membrane.

Phospholipids form a bilayer, which is the basic structure of the membrane.