Final answer:
The reaction in which glucose and fructose combine to form sucrose and water is called a dehydration synthesis reaction, where a water molecule is produced as the monosaccharides join to form a disaccharide.
Step-by-step explanation:
The reaction described in the question is the formation of sucrose from glucose and fructose. This type of reaction is known as a dehydration synthesis reaction, where two monosaccharides combine to form a disaccharide molecule with the release of water. Therefore, the correct answer is A) dehydration synthesis reaction.
Sucrose consists of glucose and fructose monomers that are joined by a glycosidic bond through a dehydration synthesis process. During this reaction, the hydroxyl group (OH) from one monosaccharide and a hydrogen atom from the other are removed, forming a molecule of water (H2O), and leaving behind a bond between the two sugar monomers.