1. Biology: Biochemistry deals with the chemical processes occurring within and related to living organisms. This includes studying the structure, function, and interactions of biomolecules like proteins, carbohydrates, lipids, and nucleic acids.

2. Chemistry: Biochemistry uses the principles and tools of chemistry to understand the chemical reactions and pathways that govern life. This involves studying the chemical composition of living matter, the chemical transformations that occur in cells, and the chemical interactions between molecules.

Therefore, biochemistry is a bridge between the biological and chemical realms, providing a deeper understanding of how living systems function at a molecular level.