Carbohydrates, Organic compounds made of carbon, hydrogen, and oxygen (usually in a 1:2:1 ratio). They serve as the primary source of energy for cells and provide structural support in plants and insects., Lipids, A diverse group of hydrophobic (water-fearing) molecules, including fats, oils, and waxes. They are crucial for long-term energy storage, forming cell membranes, and acting as signaling molecules (hormones)., Proteins, Complex macromolecules composed of amino acid chains. They perform a vast array of functions, including acting as enzymes, providing structural support, and transporting molecules across cell membranes., Nucleic Acids, Large biomolecules, such as DNA and RNA, made of nucleotides. They are responsible for storing, transmitting, and expressing genetic information within a living organism., Monomer, The basic, smaller subunit that serves as the building block for larger molecules. For example, a single glucose molecule is a monomer for starch., Polymer, A large molecule consisting of many repeating monomers linked together by chemical bonds. Proteins are polymers made of amino acid monomers., Enzymes, Specialized proteins that act as biological catalysts. They speed up chemical reactions in the body by lowering the activation energy required for the reaction to occur., Nucleotides, The building blocks of nucleic acids. Each nucleotide consists of three components: a nitrogenous base, a five-carbon sugar, and a phosphate group., Amino Acids, The organic compounds that serve as the monomers of proteins. There are 20 standard amino acids that combine in different sequences to create a wide variety of proteins., Phospholipids, A specific type of lipid that contains a phosphate "head" (hydrophilic) and two fatty acid "tails" (hydrophobic). They are the fundamental components of the cell membrane bilayer..

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