Galactose is composed of glucose molecule and a lactose molecule, therefore, galactose is classified as a __________. 09:07 Structure and Function of Macro-molecules Galactose is composed of glucose molecule and a lactose molecule, therefore, galactose is classified as a __________.A - MonosaccharideB - TrisaccharideC - PolysaccharideD - DisaccharideAnswer: D - Disaccharide Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+