5 Written questions
5 Matching questions
- a organic compound containing carbon, hydrogen, and oxygen in a ratio of on oxygen and two hydrogen atoms for each carbon atom.
- b compound whose atoms are held together by covalent bonds
- c homogeneous mixture formed when a substance (the solute) is dissolved in another substance (the solvent).
- d substance that speeds up a chemical reaction by reducing the activation energy.
- e substance dissolved in a solvent.
5 Multiple choice questions
- electrical attraction between two oppositely charged atoms or groups of atoms.
- pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means
- protein that speeds up a biological reaction by lowering the activation energy needed to start the reaction
- molecule with oppositely charged regions
- 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).
5 True/False questions
nucleotide → center of an atom; contains neutrons and protons. In eukaryotic cells, the central membrane-bound organelle that manages cellular functions and contains DNA
compound → substance dissolved in a solvent.
substrate → substance that releases hydroxide ions (OH-) when dissolved in water; a basic solution has a pH greater than 7.
acid → hydrophobic biological molecule composed mostly or carbon and hydrogen; fats, oils, and waxes are lipids
buffer → mixture that can react with an acid or a base to maintain the pH within a specific range.