This resource provides an overview of the four essential classes of biomolecules: carbohydrates, proteins, lipids, and nucleic acids, which are fundamental to life. It begins by defining core concepts, such as monomers and polymers, and identifying the primary chemical elements—carbon, hydrogen, oxygen, and nitrogen—associated with each class of biomolecule. The document outlines the structure and functions of carbohydrates, including their role as energy sources and structural components, while detailing testing methods for their identification. It further explores proteins, highlighting their diverse functions in cells and their complex structures formed from amino acids. The section on lipids covers their types and roles, particularly in cellular membranes. Lastly, the importance of nucleic acids, particularly DNA and RNA, in genetic information storage and transmission is emphasized. At the end, the resource includes class activities and exit questions to engage learners further.