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.
Chemical reactions occur when a particular part of one element or molecule meets a particular part of another element or molecule.The reaction works similar to putting a key in a lock. elements and molecules move much faster at high temperatures than they do at slower temperatures.When they move faster, they bounce into each other many more times. Thus, they have many more opportunities to hit the spot where the chemical reaction will occur.lements and molecules move much faster at high temperatures than they do at slower temperatures. When they move faster, they bounce into each other many more times. Thus, they have many more opportunities to hit the spot where the chemical reaction will occur.