Phospholipids differ from triglycerides in which of the following ways?
a. a compound containing phosphorus replaces at least one fatty acid.
b. phospholipids do not contain glycerol.
c. phospholipids do not contain fatty acids.
d. a compound containing nitrogen replaces at least one fatty acid.

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The answer is joseph is observing the colour of the reaction mixture to see whether proteins are present in the given solution.

The correct answer is b