Final answer:
Polymers are long molecules composed of chains of monomers. DNA and RNA are examples of polymers that are essential in protein synthesis.
Step-by-step explanation:
Polymers are long molecules composed of chains of units called monomers. DNA (deoxyribonucleic acid) is a polymer that consists of long, three-part chains made up of phosphate groups, sugars, and N-containing rings called bases. RNA (ribonucleic acid) is another polymer similar to DNA. Both DNA and RNA are essential substances in protein synthesis.