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Vocabulary for water unit in biology

Buffers Weak acids or bases that can react with strong acids or bases to prevent sudden changes in pH
Macromolecules Carbon molecules in living things that are so large
Monosaccharides molecules with one sugar molecule
Lipids (fats,oils,and waxes) Carbon hydrogen atoms Used to store energy and form parts of the biological membranes and waterproof coverings
Nucleic Acids (hydrogen,oxygen,nitrogen,phosphorus) Nucleotides:5- carbon sugar, a phosphate group, and nitrogen base Transmits heredity info
Proteins (nitrogen,carbon,hydrogen,& oxygen) polymers of amino acid Regulate cell process, form cellular structures, carry substances in & out of cells, help fight disease
Chemical Reaction process that changes one set of chemicals into another set of chemicals
Reactants Elements or compounds that enter into reaction
Activation Energy Energy needed to get a reaction started
Enzyme Protein that acts as a biological catalyst
Catalyst Substance that speeds up the rate of the chemical reaction
Substrates In an enzyme - catalyzed reaction, the reactants are known as substrates
Laesur Lowers activation energy and speeds up reaction
Protons Positive Charge
Neutrons No Charge
Electrons Negative charge. Electrons constantly move around the space surrounding the atom's nucleus
Isotopes Atoms of the same element that differ in the # of neutrons
Element Pure substance that consists entirely of one type of atom
Compound substance formed by the chemical combination of two or more elements in definite proportions
Ionic Bonds Forms when one or more electrons are transferred from one atom to another forming ions
Covalent Bond Electrons are shared rather than transfered
Molecule Atoms joined by covalent bonds
Van der Waals Forces Bends the molecule down
Adhesion An attraction between molecules of different substances Ex/tape and skin
Base Compound that forms OH- ions in solution
pH Scale Measures the concentration of hydrogen ions in a solution
Suspensions Mixtures of water and undissolved materials
Mixture Material composed of 2 or more elements or compounds that are physically mixed together but not chemically combined
Acid Any compound that forms H+ ions in solution
Atom The basic unit of matter
Products Elements or compounds produced by the reaction
Cohesion An attraction between 2 molecules of the same substance Ex/tape and tape
Solution Mixture in which all the components are spread out
Solute The substance dissolve
Solvent The substance causing the dissolving
Created by: winnie_luv