Condensation Reaction Forming Beta-Glycosidic Bonds in Cellulose

Steps:

• Cellulose consists of glucose monomers linked by beta-1,4 glycosidic bonds.
• Joining occurs via dehydration synthesis, removing H2O from C1 hydroxyl of one glucose and C4 hydroxyl of another.
• Correct diagram shows two beta-D-glucose units forming the bond with H2O release.
• Evaluate options for accurate depiction of this reaction.

Why D is correct:

• It illustrates dehydration synthesis, where the glycosidic bond forms per the polysaccharide polymerization formula: C6H12O6 + C6H12O6 → C12H22O11 + H2O.

Why the others are wrong:

• A: Depicts hydrolysis, adding water to break bonds instead of forming them.
• B: Shows alpha-1,4 linkage typical of starch, not beta for cellulose.
• C: Lacks water molecule release or uses incorrect glucose orientation.

Final answer: D