Question

multiple - choice question
what is a monomer?
all the pieces together / like a giant tower
a building block / one unit of a macromolecule

Explanation:

A monomer is a small molecule that can bond together with other similar molecules to form a polymer (a macromolecule). It is like a building block. The first option describes a polymer (all the pieces together), not a monomer.

Answer:

A building block / one unit of a macromolecule