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The aim of this experiment was to investigate whether or not certain foods contained the different food groups.

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Introduction

Abstract ? The aim of this experiment was to investigate whether or not certain foods contained the different food groups. If it turned black that meant it had starch, if it turned red that meant it had glucose, if it turned purple it meant it had protein and if it turned clear/transparent it had fat. The equipment used was vegetable oil, pallet, pipette, starch, glucose, albumin, iodine solution, and Benedict?s solution and copper sulphate solution. The method was simple, mixing each type of food with the food group to see if it would change colour and if it contained this food group, for example if iodine was added to starch and its colour changed it will have contained iodine in it. Introduction ? All the processes of life require energy, and this energy comes from food groups. Carbohydrates provide energy for movement and this is made up of carbon, hydrogen and sugar. It is found in cereals and pasta. Proteins are used to assist growth and repair for the body it is made up of amino acids and is found in meat and fish. ...read more.

Middle

Protein test: After we collected the food samples which were liquid in a test tube and added 5 drops of copper sulphate and 5 drops of sodium hydroxide and if the colour changes from blue to purple then the food sample does contain protein. Sugar : First collect the food samples in a test tube and add a few drops of benedicts solution. Then place the test tube in a boiling water bath. If the colour changes from blue to green and then to orange to red the sample contains sugar. The colour changes depending on the concentration of the sample. (P6) The body requires all the nutrients to remain healthy however different people will need a different variety and portion size compared to others, for example athletes will need a high diet in carbohydrates and meat because they need it to release energy and strengthen their bones more than an office worker would need it, however an office worker will need a lot of vitamin A because it spends its time on the computer working and this can damage their eyes. ...read more.

Conclusion

Starch + water + (amylase) –> maltose C6H10O5 + H20 –> C12 H22 O11 Structure of Maltose http://www.scientificpsychic.com/fitness/maltose.gif Structure of Starch http://www.sciencegeek.net/Chemistry/taters/graphics/O_Biochem/starch.gif Structure of Amylase http://diabetesmanager.pbworks.com/f/1255204037/precose.JPG Structure of water http://4.bp.blogspot.com/_NvQHHJRdJ9o/SY_aQIYWvhI/AAAAAAAAAGk/eu4L-bwoW0k/s400/water.bmp Fat + (bile) –> fat droplets Structure of fat http://legacy.owensboro.kctcs.edu/gcaplan/anat/notes/fat_f2.jpg Structure of bile http://www.biochemj.org/bj/356/0481/bj3560481f01.gif Structure of fat droplets http://upload.wikimedia.org/wikipedia/en/thumb/0/09/Lipid_droplet_structure.tif/lossless-page1-350px-Lipid_droplet_structure.tif.png Fat droplets + water + (lipase) –> glycerol + fatty acids. C55H98O6 + H20 à C3H8O3 + C18H34O2 Structure of fat droplets http://upload.wikimedia.org/wikipedia/en/thumb/0/09/Lipid_droplet_structure.tif/lossless-page1-350px-Lipid_droplet_structure.tif.png Structure of water http://4.bp.blogspot.com/_NvQHHJRdJ9o/SY_aQIYWvhI/AAAAAAAAAGk/eu4L-bwoW0k/s400/water.bmp Structure of lipase https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSCKKoVllaj4ox1kYE1k-A5sPmpljDM2lCIQcZUxG64W071B0lT8g Structure of glycerol http://home.roadrunner.com/%7Elubehawk/BioHELP%21/glycerol.jpg Structure of fatty acids http://4.bp.blogspot.com/-nhPLBj5UXJw/UXUALSR6zvI/AAAAAAAAL0k/UB5bjBxpOHc/s1600/Butyric_acid_flat_structure.png Protein + pepsin – (water, condensation reaction) –> amino acids C44189H71252N12428O14007S321 + H20 + (PEPSIN) –>C2H5NO2 Structure of protein https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcQYmLUTMNjIS37SUqKzsiKXrHxxjZ9TAxlm5YFoQpk9GyJtFuYh Structure of pepsin http://info.agscientific.com/Portals/121745/images/pepstatin%20a%20structure1.jpg Structure of amino acids http://legacy.owensboro.kctcs.edu/gcaplan/anat/notes/amino_acid_structure_2.jpg Results - Food Iodine Test Benedict’s Test Copper sulphate solution Test Fat Test Starch √ X X X Glucose X √ X X Vegetable Oil X X X √ Albumin X X √ Slightly transparent Conclusion - The results suggest that all the different foods contained different food groups within them for example starch had iodine in it but it was the only on that had iodine, none of the other foods had iodine. Strangely however albumin both contained copper sulphate solution and a little of fat because it turned slightly transparent. ...read more.

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