Structural Diversity
- Linear chains: Carbon atoms arranged in a straight line (e.g., lipids)
- Branched chains: Carbon atoms branching off the main chain (e.g., steroids)
- Rings: Carbon atoms connected to form closed loops (e.g., sugars, aromatic compounds)
- Polymers: Long chains of repeating monomer units (e.g., proteins, carbohydrates, nucleic acids)
Functional Diversity
- Hydrocarbons: Only contain carbon and hydrogen atoms (e.g., lipids)
- Carbohydrates: Contain carbon, hydrogen, and oxygen atoms; provide energy and structure (e.g., sugars, cellulose)
- Lipids: Contain carbon, hydrogen, and oxygen atoms, but with more hydrogen than oxygen; hydrophobic (e.g., fats, oils)
- Proteins: Contain carbon, hydrogen, oxygen, nitrogen, and sulfur atoms; structural components, enzymes, hormones
- Nucleic acids: Contain carbon, hydrogen, oxygen, nitrogen, and phosphorus atoms; store and transmit genetic information (e.g., DNA, RNA)
Biochemical Diversity
- Organic molecules: Contain carbon as their central atom (e.g., carbohydrates, proteins, lipids, nucleic acids)
- Inorganic molecules: Do not contain carbon (e.g., water, oxygen, salt)
- Biomolecules: Molecules essential for life processes (e.g., enzymes, ATP, hormones)
Other Types of Diversity
- Stereochemistry: Arrangement of atoms in space (e.g., enantiomers, diastereomers)
- Molecular size and complexity: From small molecules (e.g., methane) to large, complex molecules (e.g., proteins)
- Functional groups: Specific groups of atoms that impart specific chemical properties (e.g., hydroxyl, amino, carbonyl)
This diverse array of carbon compounds enables living organisms to perform a wide range of essential functions, including energy storage, information storage and transmission, structure, and catalysis.