These models represent molecules commonly found in living organisms, with each element shown in a different color. what do all of these molecules have in common? glutamine (an amino acid) palmitic acid (a fatty acid) porphyrin (a pigment) chlorophyla (o pigment) carbon hydrogen o oxygen nitrogen magnesium all their building blocks come from sugars. they all contain chains of carbon and hydrogen they are all building blocks of carbohydrates, their carbon and hydrogen can be obtained from sugar.