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.
Part 1: Heat of fusion. When water molecules are packed into a solid lattice they form bonds with their nearest neighbor molecules. To âmeltâ the solid (ice) requires the addition of energy. If the ice is at 0Â°C the addition of heat serves to break these bonds between the water molecules into a liquid state. Thus, when heat is added to the ice it melts rather than increasing in temperature. In this sense the addition of heat is not directly noticeable (by a rise in temperature) and is termed âlatentâ heat. Such a situation is characteristic also of liquid being turned into vapor.