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Multiple Choice
Which process creates a disaccharide from two monosaccharides?
A
Dehydration synthesis
B
Oxidation
C
Hydrolysis
D
Phosphorylation
Verified step by step guidance
1
Understand the question: The problem asks about the process that combines two monosaccharides to form a disaccharide. This involves a biochemical reaction where smaller molecules join to form a larger molecule.
Recall the concept of dehydration synthesis: This process involves the removal of a water molecule (H₂O) during the formation of a covalent bond between two monosaccharides. It is a common mechanism in carbohydrate synthesis.
Compare the given options: Dehydration synthesis, oxidation, hydrolysis, and phosphorylation. Note that oxidation involves electron transfer, hydrolysis breaks bonds by adding water, and phosphorylation adds a phosphate group. Only dehydration synthesis matches the description of forming a disaccharide.
Visualize the reaction: Two monosaccharides, such as glucose and fructose, undergo dehydration synthesis. A hydroxyl group (-OH) from one monosaccharide and a hydrogen atom (H) from the other are removed, forming water (H₂O). The remaining molecules bond covalently to form a disaccharide.
Summarize the process: The correct answer is dehydration synthesis because it creates a disaccharide by removing water and forming a glycosidic bond between two monosaccharides.