5 Written Questions
5 Matching Questions
- nucleic acid
- polar molecule
- a negatively charged particle that occupies space around an atom's nucleus.
- b substance that releases hydrogen ions (H+) when dissolved in water; an acidic solution has a pH less than 7.
- c molecule with oppositely charged regions
- d pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means
- e complex macromolecule that stores and communicates genetic information.
5 Multiple Choice Questions
- substance that speeds up a chemical reaction by reducing the activation energy.
- substance that exists before a chemical reaction starts; located on the left side of the arrow in a chemical reaction.
- specific place where a substrate binds on an enzyme.
- electrical attraction between two oppositely charged atoms or groups of atoms.
- two or more atoms of the same element having different numbers of neutrons.
5 True/False Questions
covalent bond → electrical attraction between two oppositely charged atoms or groups of atoms.
compound → pure substance with unique properties; formed when two or more different elements combine.
amino acid → carbon compound joined by peptide bonds; building block of proteins.
mixture → compound whose atoms are held together by covalent bonds
ion → atom that is negatively or positively charged because it have lost or gained one or more electrons.