5 Written questions
5 Matching questions
- a measure of the concentration of hydrogen ions (H+) in a solution.
- b compound whose atoms are held together by covalent bonds
- c positively charged particle in an atom's nucleus.
- d reactant to which an enzyme binds
- e large molecule formed from smaller repeating units or identical, or nearly identical, compounds linked by covalent bonds.
5 Multiple choice questions
- protein that speeds up a biological reaction by lowering the activation energy needed to start the reaction
- 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).
- substance that speeds up a chemical reaction by reducing the activation energy.
- building block of matter; contains subatomic particles—neutrons, protons, and electrons
- specific place where a substrate binds on an enzyme.
5 True/False questions
macromolecule → large molecule formed by joining smaller organic molecules together
protein → organic compound made of amino acids joined by peptide bonds; primary building block of organisms.
polar molecule → large molecule formed by joining smaller organic molecules together
compound → substance in which another substance is dissolved.
chemical reaction → energy-requiring process by which atoms or groups of atoms in substances are changed into different substances