Biology Unit 3 9th grade

Carbohydrates are organic compounds composed of carbon, hydrogen, and oxygen. They include monosaccharides (simple sugars), such as glucose, and polysaccharides (complex carbohydrates), such as starch and cellulose.

Lipids are a diverse group of molecules that are insoluble in water. They include fats, oils, and waxes, and play roles in energy storage, insulation, and cell membrane structure.

Proteins are large, complex molecules composed of amino acids. They have various functions, including enzyme catalysis, structural support, and transport of molecules.

Nucleic acids, such as DNA and RNA, are macromolecules that store and transmit genetic information. They are composed of nucleotides and play crucial roles in protein synthesis and inheritance.