5 Written questions
5 Matching questions
- polar molecule
- chemical reaction
- a substance that speeds up a chemical reaction by reducing the activation energy.
- b molecule with oppositely charged regions
- c energy-requiring process by which atoms or groups of atoms in substances are changed into different substances
- d organic compound containing carbon, hydrogen, and oxygen in a ratio of on oxygen and two hydrogen atoms for each carbon atom.
- e substance that releases hydrogen ions (H+) when dissolved in water; an acidic solution has a pH less than 7.
5 Multiple choice questions
- organic compound made of amino acids joined by peptide bonds; primary building block of organisms.
- combination of two or more different substances in which each substance keeps its individual characteristics; can have a uniform composition (homogeneous) or have distinct areas of substances (heterogeneous).
- measure of the concentration of hydrogen ions (H+) in a solution.
- building block of matter; contains subatomic particles—neutrons, protons, and electrons
- reactant to which an enzyme binds
5 True/False questions
solute → substance dissolved in a solvent.
lipid → substance that releases hydrogen ions (H+) when dissolved in water; an acidic solution has a pH less than 7.
polymer → protein that speeds up a biological reaction by lowering the activation energy needed to start the reaction
reactant → substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
molecule → compound whose atoms are held together by covalent bonds