How does the carbon, hydrogen and oxygen atoms in glucose and fructose combine to form sucrose?

Answer 1

The monosaccharides of glucose and fructose combine in the holy matrimony of a glycosidic bond. What this entails is that the -OH group on the 1-carbon of the glucose (far right corner) combines with the -OH group on the 2-carbon of the fructose (far left corner) in a dehydration reaction, where the hydrogens come off and the two monosaccharides are joined by a single oxygen atom to become a disaccharide.