Among the molecules listed, the following are classified as polymers:
- RNA - Ribonucleic acid is a polymer composed of nucleotide monomers.
- DNA - Deoxyribonucleic acid is a polymer made up of nucleotide monomers as well.
- Cellulose - This is a polysaccharide (a carbohydrate) that is a polymer made of glucose monomers.
- Polypeptide - This is a polymer made up of amino acid monomers.
The other molecules listed are not classified as polymers:
- Monosaccharide - This is a single sugar unit and is not a polymer.
- Amino Acid - This is a single unit (monomer) and not a polymer by itself.
- Lipid - Lipids are generally not polymers, as they are composed of various building blocks (like glycerol and fatty acids) but do not form long repetitive chains.
- ATP (Adenosine Triphosphate) - This is a nucleotide and is not a polymer, although it is a building block for RNA and DNA.
So, the polymers from your list are RNA, DNA, cellulose, and polypeptide.