There are three classifications for Carbohydrates: Lipids are also an important component of the cell membrane. The last groups of tests were on lipids.
This reaction is caused by the reducing property of simple carbohydrates. Tell students that they will test various food items for the presence of these three macromolecules.
In A, there is little amount of protein. Plant oils can be turned into a solid form margarine, crisco by hydrogenating the fatty acids. What is the main nutrient in the unknown? Materials and Methods Please refer to pages of the fall BIOL l manual for material and methods for this la. The third lab for carbohydrates consisted of cleaning four test tubes and labeling them 1 through 4.
Carbohydrates contain carbon, hydrogen, and oxygen. The fourth lab for carbohydrates was performed by slicing a piece of onion and looking at it through a microscope.
In DNA deoxyribose nucleic acid the sugar is a deoxyribose and the nitrogenous bases are adenine, guanine, cytosine and thymine.
The results included color changes with Ninhydrin solution on the Amino acid sample and the Albumin sample. October 5, 2: Biuret tests for protein only. The copper atom of the biuret solution reacts with the peptide bonds to cause the color change. The results of this were also conclusive.
Lipids A lot of lipids function as long-term energy storage. Proteins Proteins are complex, specialized molecules composed of carbon, oxygen, hydrogen, nitrogen and sometimes sulfur. For older students provide more detail: The second lipid test was for fats and oils.Testing Food for Biological Macromolecules/Nutrients Alicia Y.
Zheng B Block Honors Biology Mr. Quick The Webb Schools By using various chemicals known to test for specific macromolecules (Benedict's test for glucose, iodine for starch, Biuret for protein, and Sudan III for fat), students will be able to identify the components of 10 different unknown solutions.
Characteristic subunits and groups impart different chemical properties to macromolecules. Because of this, these macromolecules can be identified by solubility v.
non-solubility. Procedure 1 Perform Benedict¶s test for reducing sugars Introduction Benedict¶s test allows for the detection of the 5/5(2).
Unknown Lab Report April 25th, Introduction The purpose of this lab was to identify two unknown bacteria cultures using various differential tests. The identification of these unknown cultures was accomplished by separating and differentiating possible bacteria.
LAB REPORT Introduction All living things contain organic molecules such as lipids, carbohydrates, proteins and acids. In order to detect the presence of carbohydrates, proteins and lipids we have to do experiments. The Iodine test is used to detect the presence of carbohydrates.
Honors Biology students experiment with different unknown solutions to figure out what nutrients they are made out of. Using indicator tests for glucose, starch, protein and lipid, this can serve as a good introduction to living organisms and their functions and characteristics in real life.
Aug 02, · Bio Biological Molecules of Life Lab Report. Biological Molecules of Life. Jessica Leonard. Biology Lab. April 5, Abstract. This lab was done to test for macromolecules consisting of carbohydrates, lipids, proteins, and nucleic acids by using specific reagents to test for each.Download