I am stuck on this question....Which are long chains formed by the process of polymerization?

My answer is (D).DNA strands. Am I correct?

yes

Yea, correct

Yes, you are correct! DNA strands are indeed long chains formed by the process of polymerization.

Polymerization is a chemical process in which small molecules called monomers are chemically bonded together to form a long chain called a polymer. In the case of DNA, the monomers are nucleotides, which consist of a sugar, a phosphate group, and a nitrogenous base (adenine, thymine, cytosine, or guanine). Through a process called DNA polymerization, these nucleotides are joined together to form long chains known as DNA strands.

Each DNA strand consists of a backbone made up of alternating sugar and phosphate molecules, with the nitrogenous bases extending from the sugar molecules. The specific sequence of the nitrogenous bases along the DNA strand carries genetic information and plays a crucial role in the functioning of cells and organisms.