* Hydrogen (H): The most common element found in organic molecules.
* Oxygen (O): Often found in functional groups, such as alcohols, ketones, and aldehydes.
* Nitrogen (N): Essential component of amino acids, nucleic acids, and other important molecules.
* Phosphorus (P): Key element in nucleic acids and phospholipids.
* Sulfur (S): Found in some amino acids, proteins, and vitamins.
How Carbon Forms the Backbone:
Carbon's unique ability to form four covalent bonds with other atoms allows it to create long chains, branched structures, and rings. This versatility is what enables the vast diversity of organic molecules.
Functional Groups:
These are specific groups of atoms that are attached to the carbon backbone. They give organic molecules their unique chemical properties and reactivity. Some common functional groups include:
* Hydroxyl (-OH): Alcohols
* Carbonyl (C=O): Aldehydes and ketones
* Carboxyl (-COOH): Carboxylic acids
* Amino (-NH2): Amines
* Phosphate (-PO4): Phosphates
Examples of Organic Molecules:
* Carbohydrates: Made of carbon, hydrogen, and oxygen. Examples include sugars, starches, and cellulose.
* Lipids: Include fats, oils, and steroids. They are composed primarily of carbon, hydrogen, and oxygen, with a higher proportion of hydrogen.
* Proteins: Made of amino acids, which contain carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.
* Nucleic Acids: DNA and RNA are made of nucleotides, which contain carbon, hydrogen, oxygen, nitrogen, and phosphorus.
In summary, the building blocks of organic molecules are carbon atoms, linked together in various ways and modified by functional groups, creating a vast array of molecules essential for life.
