Which test indicates the presence of proteins in foods

The biuret test indicates the presence of proteins by detecting peptide linkages.

Biuret reagent is a blue solution that, when it reacts with protein, will change color to pink-purple.

The formula for biuret reagent is NH2C(O)NHC(O)NH2

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explanation:

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the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.