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Practice problem

Triglyceride — Structure & Function

By Hannah Bonville
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In order to test for the presence of substances like proteins, carbohydrates, and lipids, various reagents can be added. In the presence of particular macromolecules, each reagent turns a different color. These colors and reagents are listed in the table below.

Different reagents and the substances they test for are listed. Benedict's reagent tests for monosaccharides like glucose and turns orange or brick red when in contact with the substance. Biuret reagent tests for protein and turns light purple. Sudan 3 tests for lipids and lipoproteins, it turns reddish orange. Iodine turns starches dark blue or black.

Imagine that a sample of triglycerides is exposed to each of the reagents in the table above. What color will the solution turn?

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Type a concept, like “slope” or “photosynthesis”.

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