Question

multiple choice question
carboxyl and phosphate groups are examples of ________.
o oxidizing agents
o free radicals
o colloids
o functional groups

Explanation:

Carboxyl ($-COOH$) and phosphate ($-PO_{4}^{2 -}$) are characteristic groups in organic and biochemistry that confer specific chemical properties to molecules. They are known as functional groups. Oxidizing agents cause oxidation in other substances, free - radicals are species with unpaired electrons, and colloids are mixtures with dispersed particles.

Answer:

D. functional groups