Which statement about polymerization is true?

• A. It is accomplished through ionic bonding
• B. It takes place without dehydration
• C. It forms polymers by breaking monomer bonds
• D. It proceeds through covalent bonds and dehydration

Answer: (D)

polymerization builds chains by joining monomers through covalent bonds, usually via dehydration (condensation) reactions that release a water molecule. That combination—forming covalent linkages and eliminating water—fits the standard way biological macromolecules like proteins, polysaccharides, and nucleic acids are assembled. The idea that bonds are ionic isn’t how these polymers are formed, and polymerization does not typically proceed by breaking monomer bonds to make the chain. Likewise, polymerization commonly involves bond formation plus a dehydration step, not a process that happens entirely without removing water.