Understanding the basics of carbohydrates, proteins, amino acids, and lipids is essential for grasping their roles in biology. Carbohydrates consist of carbon, hydrogen, and oxygen, primarily serving as energy sources, with structures ranging from simple sugars to complex polysaccharides like starch and cellulose. Proteins are composed of amino acids linked by peptide bonds, and their functionality is heavily influenced by the chemical nature of their side chains. The tertiary structure of proteins, which results from the folding of amino acid chains, is crucial for their enzymatic functions. Amino acids themselves are the building blocks of proteins and share similar elemental compositions. Lipids encompass a diverse group of molecules, including fats and oils, with no single defining structure. To enhance comprehension, it is recommended to explore the biosynthesis and functional roles of these biomolecules alongside their structural details, as this approach fosters a deeper understanding and retention of the material. Engaging with visual resources and practical examples can also aid in learning.