5 Written questions
5 Matching questions
- covalent bond
- ionic bond
- a type of chemical bond formed when atoms share electrons.
- b substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
- c building block of matter; contains subatomic particles—neutrons, protons, and electrons
- d two or more atoms of the same element having different numbers of neutrons.
- e electrical attraction between two oppositely charged atoms or groups of atoms.
5 Multiple choice questions
- hydrophobic biological molecule composed mostly or carbon and hydrogen; fats, oils, and waxes are lipids
- specific place where a substrate binds on an enzyme.
- substance that releases hydrogen ions (H+) when dissolved in water; an acidic solution has a pH less than 7.
- molecule with oppositely charged regions
- substance that speeds up a chemical reaction by reducing the activation energy.
5 True/False questions
enzyme → large molecule formed from smaller repeating units or identical, or nearly identical, compounds linked by covalent bonds.
substrate → substance that releases hydroxide ions (OH-) when dissolved in water; a basic solution has a pH greater than 7.
solution → homogeneous mixture formed when a substance (the solute) is dissolved in another substance (the solvent).
compound → pure substance with unique properties; formed when two or more different elements combine.
macromolecule → compound whose atoms are held together by covalent bonds