The origin of replication (also called the replication origin) is a particular sequence in a genome at which replication is initiated.
It is the interaction of two or more substances, resulting in chemical changes in them. Chemical reactions take place when some kind of energy is supplied to them. The supplied energy may be in the form of heat, light or mechanical shaking for proper contact between the reactant molecules or electricity.
3. The Temperature of the Reactants In nearly all cases, the rate of a reaction increases with increasing temperature. A rule of thumb for many reactions: Each time the temperature is increased by 10 o C, the rate of the reaction doubles! This temperature effect can be extremely powerful.