Question

which macromolecule is characterized by the following functions? structural support, molecule transport, communication, defense (antibodies), muscle movement, digestion nucleic acids carbohydrates lipids proteins

Explanation:

Proteins are macromolecules that serve multiple functions. Structural support (e.g., collagen in connective tissues), molecule transport (e.g., hemoglobin transporting oxygen), communication (e.g., hormones like insulin), defense (antibodies), muscle movement (actin and myosin), and digestion (enzymes like amylase) are all functions of proteins. Nucleic acids (DNA, RNA) store genetic information. Carbohydrates are for energy storage (e.g., glycogen) and structure (e.g., cellulose). Lipids are for energy storage (fats), membrane structure (phospholipids), and signaling (steroids).

Answer:

proteins