The three common components of all amino acids are: a central carbon atom bonded to a hydrogen atom, a carboxylic acid group, and

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All amino acids have a nitrogen-containing amino group (-NH2) attached to the central carbon atom, along with a carboxylic acid group (-COOH) on the opposite side. The side chain or R-group varies among different amino acids. Sulfur-containing amino group and positively charged R-groups are not universal components of all amino acids.

The Three Common Components of All Amino Acids Are: a Central