What is produced and released when glucose and fructose combine to form sucrose?

A water molecule (H2O) is produced and released. both glucose and fructose is a monosaccharide, when 2 combined together, a disaccharide is formed. this process is called condensation, and it releases an extra water molecule because the water molecule is removed.

when those 2 splits up, it will use up that extra water molecule, and that process is called hydrolysis.