Explain how a water molecule is produced when glucose and fructose undergo a condensation
reaction.

First, a Hydroxide atom is taken from the Glucose, and a Hydrogen from the fructose.
Then, a bond happen between Hydroxide (OH) and Hydrogen (H), creating the atom H2O, which the formula of water.

Hope this Helps :)

A condensation is a process where liquid changes into a gaseous form also known as water vapour. It occurs in the atmosphere when the temperature rises.
Water is produce when glucose and fructose undergo a condensation process. The water is removed by the combination of hydrogen and a hydroxyl together. Glucose and Fructose forms a substance called glycosidic linkage. And hydrogen and hydroxyl is separated from glucose and fructose. When Hydrogen and hydroxyl is combined, they create H2o or water.