Question

most dietary and storage lipids are triglycerides. this means that they are made of glycerol combined with three carboxylic acids, called fatty acids.
identify the lipid by its formula.
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Explanation:

• Option A shows a structure with amino acids (\(H_2N-\), \( -COOH\)), which is a protein (polypeptide) structure, not a lipid.
• Option B shows a glycerol molecule (\(C_3H_8O_3\)) combined with three fatty - acid chains (carboxylic acids with long hydrocarbon tails), which is the structure of a triglyceride (a type of lipid).
• Option C has phosphate groups (\( - PO_4\)) and nitrogen - containing rings, which is a nucleotide (part of nucleic acids like DNA/RNA), not a lipid.

Answer:

B.