Condensation reactions build polymers by eliminating water

Steps:

• Recall that condensation reactions join monomers by forming covalent bonds and releasing water.
• Evaluate option A: breaking a glycosidic bond requires adding water (hydrolysis), opposite of condensation.
• Evaluate options B, C, D: these involve bond formation and water loss, aligning with condensation.
• Conclude A cannot result from condensation.

Why A is correct:

• Condensation reactions synthesize bonds (e.g., glycosidic or peptide) by dehydration; breaking bonds via glycosidic cleavage follows hydrolysis, adding H₂O per the reaction formula: polymer + H₂O → monomers.

Why the others are wrong:

• B: Glycosidic bonds form between monosaccharides via condensation, releasing H₂O.
• C: Amino acids join into peptides through condensation, forming -CO-NH- bonds and H₂O.
• D: Water molecule production defines condensation reactions.

Final answer: A