Question

what are the most common building blocks of lipids (note that lipids do not have a set and true monomer like the other biomolecules)?

monosaccharides

amino acids

fatty acids

nucleic acids

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Explanation:

Monosaccharides are building blocks of carbohydrates. Amino acids are building blocks of proteins. Nucleic acids are made of nucleotides. Lipids, like triglycerides, often have fatty acids as a key component (along with glycerol in triglycerides). So the most common building block among the options for lipids (in a general sense as lipids don't have a strict monomer like other biomolecules) is fatty acids.

Answer:

C. fatty acids