5 Written questions
5 Matching questions
- a substance formed by a chemical reaction; located on the right side of the arrow in a chemical equation.
- b pure substance with unique properties; formed when two or more different elements combine.
- c building block of matter; contains subatomic particles—neutrons, protons, and electrons
- d center of an atom; contains neutrons and protons. In eukaryotic cells, the central membrane-bound organelle that manages cellular functions and contains DNA
- 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
- molecule with oppositely charged regions
- specific place where a substrate binds on an enzyme.
- pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means
- complex macromolecule that stores and communicates genetic information.
5 True/False questions
solvent → substance in which another substance is dissolved.
mixture → two or more atoms of the same element having different numbers of neutrons.
acid → substance that releases hydrogen ions (H+) when dissolved in water; an acidic solution has a pH less than 7.
proton → organic compound made of amino acids joined by peptide bonds; primary building block of organisms.
substrate → reactant to which an enzyme binds