5 Written questions
5 Matching questions
- active site
- a compound whose atoms are held together by covalent bonds
- b substance that releases hydrogen ions (H+) when dissolved in water; an acidic solution has a pH less than 7.
- c specific place where a substrate binds on an enzyme.
- d organic compound made of amino acids joined by peptide bonds; primary building block of organisms.
- e substance that speeds up a chemical reaction by reducing the activation energy.
5 Multiple choice questions
- large molecule formed from smaller repeating units or identical, or nearly identical, compounds linked by covalent bonds.
- energy-requiring process by which atoms or groups of atoms in substances are changed into different substances
- center of an atom; contains neutrons and protons. In eukaryotic cells, the central membrane-bound organelle that manages cellular functions and contains DNA
- large molecule formed by joining smaller organic molecules together
- positively charged particle in an atom's nucleus.
5 True/False questions
reactant → substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
isotope → two or more atoms of the same element having different numbers of neutrons.
neutron → particle without a charge in an atom's nucleus
product → substance formed by a chemical reaction; located on the right side of the arrow in a chemical equation.
lipid → hydrophobic biological molecule composed mostly or carbon and hydrogen; fats, oils, and waxes are lipids