Q10 • A value that compares the rate of a biochemical process or reaction over a 10°C range of temperature. A process that is not temperature-sensitive has a Q10 of 1. Values of 2 or 3 mean the reaction speeds up as temperature increases.
Quantum (kwon´ tum) [L. quantus: how great] • An indivisible unit of energy.
Quaternary structure • Of aggregating proteins, the arrangement of polypeptide subunits.