Biomolecules Lab Report

Did you know that all organisms consist of basic units of matter called atoms. When atoms are bonded together they make up a molecule. Often associated with nonliving things are inorganic molecules, and associated with organisms are biomolecules. Today in lab, a series of tests were ran. Tested were the biomolecules of cells which are lipids, sugars, proteins and starch. The purpose of these tests were to test for the presences of cellular biomolecules. Some of the things that fat consist of are one glycerol and three fatty acids. Proteins are considered polymers. They are made up of smaller molecules called subunits. Now with proteins they contain a large number of amino acids that are joined together by a peptide bond. With the starches, they contain a large number
Using a designated graduated transfer pipets, add 1 ml of distilled water, albumin, and starch to the according test tubes. Add five drops of Biuret reagent to the tubes with a swirling motion to mix. Reaction is almost instant. Record your observations.
Method: Test for Starch Label five new clean test tubes (1 to 5). Using a designated graduated transfer pipets, add 1 ml of water, starch suspension, onion juice, potato juice, and glucose solution to the according test tubes. Add two drops of iodine solution to the test tubes at the same time. Note the final color change and record observations.
Method: Test for sugar Prepare boiling water and label five clean test tubes (1 to 5). Using a designated graduated transfer pipets, add 1 ml of water, glucose solution, starch suspension, onion juice, and potato juice to the according test tubes. Add five drops of Benedict's reagent to all test tubes at the same time. All tubes should be placed into the boiling water at the same time. After few minutes past, a change of color would have happened. Remove all tubes from the boiling water and record observations.
Method: Test for