Macromolecules and Indicator Tests DRAFT. 9th - 11th grade. 669 times. Biology. ... Which chemical indicator test for Lipid? answer choices . Sudan IV . Name:_____ Date:_____ Macromolecule Indicator Lab Use the following website to watch the video and complete the lab. Watch the entire video first. Then go to each type of molecule to help you answer the questions.-lab.html 1. Which test is used to test for the presence of a protein?
Test for Fats (lipids) Sudan IV • Like lipids, the chemical Sudan IV is not soluble in water; it is, however, soluble in lipids. • In this test dark red Sudan IV is added to a solution along with ethanol to dissolve any possible lipids. • If lipids are present the Sudan IV will stain them reddish-orange (positive test).
There are laboratory tests that can be used to determine the presences of these macromolecules. These tests and their results are: Benedict's test for glucose (or reducing sugar): positive result - red/orange . Iodine test for starch, also called Lugol's test: positive result - black . Brown paper bag test for lipids: positive result –clear