Sudan IV is a colored substance that dissolves into lipids. A raw egg is separated into the egg white and the egg yolk. Sudan IV
is dropped into the egg white. It does not dissolve but stays as one tight ball. Sudan IV is dropped into the egg yolk. It spreads through the egg yolk by dissolving into the yolk. What does this suggest about the egg yolk versus the egg white?
The experiment described above shows that THE EGG YOLK IS COMPOSED OF LIPIDS WHILE THE EGG WHITE DOES NOT HAVE LIPID COMPONENT. The Sudan IV reagent dissolved into the egg yolk because lipids are present in the egg yolk. The reagent did not dissolve into the egg white because lipids are absent. Thus, the egg white does not contain lipids while the egg yolk contains lipids.
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