group of the sugar to produced a red-brown precipitate. Increasing levels of reducing sugar would be shown if the solution changed colors ranging from green, orange, red, or brown (Gurien, 2008). The biuret test for protein is used to detect the reaction of peptides and proteins. The reagent is made of sodium hydroxide and copper sulfate, which turns the solution violent in the presence of proteins (Garcia, 2002). The violet color is a positive test for the presence of protein, the more intense the…
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