This document provides an overview of biochemistry and cells. It discusses that cells use the same basic biomolecules like proteins, nucleic acids, and polysaccharides which are made up of smaller subunits called monomers linked together. It also describes that cellular processes are powered by ATP which contains high-energy bonds. Additionally, it outlines the key differences between prokaryotic and eukaryotic cells, noting that prokaryotes like bacteria are single-celled and smaller while eukaryotes can be single or multicellular and have membrane-bound organelles.