Question

select all the correct answers. which substances are made up of polymers?
☐ dna
☐ a glass bottle
☐ ice crystals
☐ the proteins in hair
☐ rubber car tires

Explanation:

• DNA: DNA is a polymer made of nucleotide monomers.
• A glass bottle: Glass is an amorphous solid, mainly composed of silicates, not a polymer.
• Ice crystals: Ice is water in solid form (H₂O molecules), not a polymer.
• The proteins in hair: Proteins are polymers made of amino acid monomers, and hair contains keratin (a protein).
• Rubber car tires: Rubber (often synthetic or natural) is a polymer; natural rubber is polyisoprene, and synthetic rubbers are also polymer-based.

Answer:

DNA, the proteins in hair, rubber car tires