In J, there is considerable amount of glucose and little amount of fat. There are 20 different amino acids that combine to form polypeptides proteins.
Other important polysaccharides are cellulose and chitin. The following compounds were rubbed on each circle respectively: After demonstrating both tests, have students tests various food items for glucose or starch using the above procedure.
The depth of the scientific content discussed with the students will depend on their age and the lesson focus for ex. All four tubes were placed in a boiling water bath for 5 minutes. Table sugar disaccharide is a non-reducing sugar and does also not react with the iodine or with the Benedict Reagent.
Not thoroughly washing the test tubes between four different experiments. The result would bring out a specific color change in the macromolecule. Lipid station Intro Show students the great variety of lipids. Different reagents can be used to find the presence of these macromolecules.
Demonstrate to students how to perform the test. Ask them if they can sort them into different categories.
Each tube was filled with 10 drops of distilled water, amino acid solution, albumin solution, and starch solution respectively. A great way to check whether students have mastered the tests is to give them one or more unknown samples of mixtures of lipids, carbohydrates and proteins and have students perform the tests above to figure out which of the macromolecules the sample contains.
Discuss the importance of a control. The oil, lard, and margarine were expected to leave a translucent spot and they did. Allow students to test different samples for the presence of lipids. Put ml of starch solution in a test tube Add drops of iodine A bluish black color indicates a positive test for starch.
The color results were recorded in table 3. Proteins have many important roles in organisms. The first test started by cleaning four test tubes and labeling them 1 through 4. In B, there is little amount of lipid fat and glucose. According to the results, Unknown B, E and J contain a lot of glucose monosaccharides.
Proteins Proteins are complex, specialized molecules composed of carbon, oxygen, hydrogen, nitrogen and sometimes sulfur.
The results were recorded in table 8. The fourth lab for carbohydrates was performed by slicing a piece of onion and looking at it through a microscope. Each test tube was filled with 10 drops respectively of distilled water, glucose solution, sucrose solution, and starch solution.
The results included color changes with Ninhydrin solution on the Amino acid sample and the Albumin sample. The results of this were also conclusive. All tubes were placed in boiling water for 3 minutes. Ten drops of sodium hydroxide were added to each tube. By using the Sudan III test the presence of lipids can be found.
Test for Starch Polysaccharide: I would thoroughly wash test tubes with soap and brush before beginning another experiment. For the second carbohydrate lab, four test tubes were cleaned and labeled 1 through 4.
Hydrogen atoms are added to the fatty acids chain and remove the double bonds that caused the "bends". Checking for student understanding: Cellulose makes up the cell wall of plants whereas chitin provides structure to fungi and the exoskeleton of arthropods.
Sudan red can stain clothes. The second test on proteins consisted of cleaning four test tubes and labeling them 1 through 4.Testing Macromolecules Lab p.
3 LIPIDS Lipids are nonpolar and therefore do not dissolve in water.
cm of cream and 1 2. 3. Table 3. TEST TUBES Vegetable oil and Sudan IV after 1 minute Sudan IV and. 2 Designing Experimental Controls Because you are going to be testing for the presence of different macromolecules in this lab, there are several important steps that you must first take to ensure that you properly interpret your results.
Search this site. Testing For Biological Macromolecules/Nutrients including sugar, carbohydrates, protein and lipids. Stephanie Cho. Abstract: 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. TESTING FOR MACROMOLECULES Title: Testing for Macromolecules Abstract: To test for macromolecules (carbohydrates, lipids, nucleic acids, and proteins), iodine solution, alcohol, aceto-orcein stain and copper sulfate solution are used.
The conclusions for all of the tests are positive. Essays - largest database of quality sample essays and research papers on Testing Macromolecules Conclusion.
Aug 02, · 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.
The result would bring out a specific color change in the macromolecule.Download