Most american diets emphasize ________ as the main nutrient.

Acarbohydrates.
Bprotein.
Cfat.
Dvitamins user: polypeptide contain ______.
Atwo amino acids joined by peptide bonds.
Bfour amino acids joined by peptide bonds.
Cfive to ten amino acids joined by peptide bonds.
Dmore than ten amino acids joined by peptide bonds