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Biology Chapter 3-2
| Term | Definition |
|---|---|
| carbohydrate | organic compounds composed of carbon, hydrogen, and oxygen in a ratio of about one carbon atom to two hydrogen atoms to on oxygen atom |
| monosaccharide | a monomer of a carbohydrate. A simple Sugar. Contains carbon, hydrogen and oxygen in a ratio of 1:2:1. |
| disaccharide | When two monosaccharides combine to create a double sugar. |
| polysaccharide | a complex molecule composed of three or more monosaccharides. |
| protein | organic compounds composed mainly of carbon, hydrogen, oxygen and oxygen. Formed from amino acids. |
| amino acid | The linkage of monomers |
| peptide bond | When two amino acids form a covalent bond. |
| polypeptide | When amino acids form long chains they make____. Proteins are made up of these. |
| enzyme | RNA or protein molecules that act as biological catalysts. |
| substrate | a part, substance, or element that lies beneath and supports another part, substance or element. The reactant in reactions catalyzed by enzymes. |
| active site | the site on an enzyme that attaches to a substrate |
| lipid | a large non polar organic molecule including fats and steroids, they store energy and make up cell membranes. |
| fatty acid | an organic acid that is contained in lipids such as fats or oils. |
| phospholipid | a lipid that contains phosphorous and that is a structural component in cell membranes |
| wax | a type of structural lipid consisting of a long fatty acid chain that is joined to a long alcohol chain. |
| steroid | a type of lipid that consists of four carbon rings of which various functional groups are attached and that usually has a physiological action. |
| nucleic acid | an organic compound, either RNA or DNA, whose molecules are made up of one or two chains of nucleotides and carry genetic information |
| DNA deoxyribonucleic acid | the material that contains the information that determines inherited characteristics. |
| ribonucleic acid | a natural polymer that is present in all living cells and that plays a role in protein synthesis |
| nucleotide | in a nucleic acid chain, a subunit that consists of a sugar , a phosphate, and a nitrogenous base |