Domains & Kingdoms
Domains/Kingdoms 3 Domains 1) Bacteria 2) Archaea 3) Eukarya Eubacteria Archaebacteria Protista Fungi Plantae Animalia
Molecules of Life Chapter 2 Section 3
Carbohydrates Organic compounds composed of carbon, hydrogen, and oxygen in a ratio of about one carbon atom to two hydrogen atoms to one oxygen atom Three Types: Monosaccharides Disaccharide Polysaccharide
Carbohydrates (cont) Roles of Carbohydrates Store Energy (starch, glycogen) Structural Components/Material (cellulose, chitin)
Proteins Organic compounds composed mainly of carbon, hydrogen, oxygen, and nitrogen. Proteins are formed by a linkage of Amino Acids
Proteins (cont) Roles of Proteins Serve as enzymes (Lactase) Structural Components (hair, cartilage) Peptide Hormones (insulin)
Enzymes RNA or protein molecules that act as a catalyst (speed up) in a reaction.
Lipids Large, nonpolar organic molecules. They do not dissolve in water. Lipids include: Triglycerides, phospholipids, steriods, waxes, fatty acids, and pigments.
Lipids (cont) Roles of Lipids: Store energy (body fat) Form membranes (cell membrane) Steroid hormones (Testosterone)
Nucleic Acid Very large and complex organic molecules that store and transfer important information in the cell. Two major types of nucleic acids: DNA (Deoxyribonucleic acid) RNA (Ribonucleic acid)
Nucleic Acid (cont) Roles of Nucleic Acids: Stores genetic information (DNA) Direct production of proteins (RNA)