5 Written questions
5 Matching questions
- active site
- nucleic acid
- a negatively charged particle that occupies space around an atom's nucleus.
- b specific place where a substrate binds on an enzyme.
- c complex macromolecule that stores and communicates genetic information.
- 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 homogeneous mixture formed when a substance (the solute) is dissolved in another substance (the solvent).
5 Multiple choice questions
- compound whose atoms are held together by covalent bonds
- two or more atoms of the same element having different numbers of neutrons.
- pure substance with unique properties; formed when two or more different elements combine.
- particle without a charge in an atom's nucleus
- organic compound containing carbon, hydrogen, and oxygen in a ratio of on oxygen and two hydrogen atoms for each carbon atom.
5 True/False questions
enzyme → large molecule formed from smaller repeating units or identical, or nearly identical, compounds linked by covalent bonds.
amino acid → substance that releases hydrogen ions (H+) when dissolved in water; an acidic solution has a pH less than 7.
polymer → substance dissolved in a solvent.
reactant → substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
mixture → 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).