Arrange the following in order of size, from smallest to largest: polymer, monomer, carbon atom,
macromolecule.

We can arrange the following entities from sizes smallest to largest in:
1.                                 Carbon atom. Consider the carbon atom in the periodic table which evidently small in size. Like any other atom such as hydrogen and oxygen.
2.                                 Monomer. Is a singular molecule that can combine itself with elongated chains and other molecules. And thus form,
3.                                 Polymer. Polymers are made from a complex amalgamation of monomers.
4.                                 Macromolecule. And thus the macromolecules from the word macro are the biggest component. Which forms the lipid, proteins, RNA enzymes in the cell.