Final answer:
The removal of a molecule of water during the formation of sucrose is known as dehydration synthesis, resulting in a glycosidic bond between glucose and fructose.
Step-by-step explanation:
The formation of sucrose involves the removal of a molecule of water, a process known as dehydration synthesis. This occurs when a molecule of glucose and a molecule of fructose combine. A glycosidic bond forms between carbon 1 in glucose and carbon 2 in fructose as a result of this reaction. Specifically, in the synthesis of sucrose, the hydroxyl group (-OH) of glucose and a hydrogen atom from fructose come together to release a molecule of water, creating the disaccharide sucrose with its characteristic covalent bond. This condensation reaction is critical for the formation of various carbohydrates, including disaccharides like sucrose.