Question

the biological macromolecules that make up cells have very important functions, many of which are interconnected. consider the molecule shown in the box in this diagram. a series of exactly three of these molecules is directly responsible for the proper placement of what? amino acids in a polypeptide chain, cellulose fibers in a plant cell wall, fatty acids on a glycerol backbone, glucose monomers in a starch molecule

Explanation:

The molecule in the box is a nitrogenous base (a component of nucleotides). In the context of genetics, a triplet of nucleotides (codon) in mRNA determines the placement of amino acids in a polypeptide chain during translation. Cellulose (a polysaccharide), fatty acids (components of lipids), and glucose (monomer of starch) do not involve triplet - based placement mechanisms like the genetic code.

Answer:

amino acids in a polypeptide chain