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.
yes because the heat gives then energy allowing the particles to move faster, or it works the other way around, if cooled the particles get less energy so they move around a lot less. that is why when water is heated it turns into a gas because the particles are spacing out and turning into a gas.