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Chapter 3, Section 2

Vocab for 3.2 Biology

Active Site The site on an enzyme that attaches to a substrate
Amino Acid An organic molecule that contains a carboxyl and an amino group and that makes up proteins; a protein monomer
Carbohydrate An organic compound that is made of carbon, hydrogen, and oxygen and that provides nutrients to the cells of living things
Deoxyribonucleic Acid (DNA) The information that directs the characteristics of an organism and directs its cell activities
Disaccharide A sugar formed from two monosaccharides
Enzyme A type of protein or RNA molecule that speeds up metabolic reactions in plants and animals without being permanently changed or destroyed
Fatty Acid An organic acid that is contained in lipids, such as fats or oils
Lipid A large, nonpolar organic molecule, including fats and steroids; lipids store energy and make up cell membranes
Monosaccharide A simple sugar that is the basic subunit, or monomer, of a carbohydrate
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
Nucleotide In a nucleic-acid chain, a subunit that consists of a sugar, a phosphate, and a nitrogenous base
Peptide Bond The chemical bond that forms between the carboxyl group of one amino acid and the amino group of another amino acid
Phospholipid A lipid that contains phosphorous and that is a structural component in cell membranes
Polypeptide A long chain of several amino acids
Polysaccharide One of the carbohydrates made up of long chains of simple sugars; polysaccharides including starch, cellulose, and glycogen
Protein An organic compound that is made of one or more chains of amino acids and that is a principal component of all cells
Ribonucleic Acid (RNA) A natural polymer that is present in all living cells and that plays a role in protein synthesis
Steroid A type of lipid that consists of four carbon rings to which various functional groups are attached and that usually has a physiological action
Substrate A part, substance, or element that lies beneath and supports another part, substance, or element; the reactant in reactions catalyzed by enzymes
Wax A type of structural lipid consisting of a long fatty-acid chain that is joined to a long alcohol chain
Created by: CareGraceR