Cellular metabolism is the set of chemical reactions that occur in living organisms in order to maintain life. Cellular metabolism involves complex sequences of controlled biochemical reactions, better known as metabolic pathways.
In other words, metabolism is all of the chemical reactions that occur inside a cell
A metabolic pathway is a series of steps that occur in reactions that help convert molecules or substrates, such as sugar, into different, more readily usable materials. These reactions occur inside of a cell, where enzymes, or protein molecules, break down or build up molecules