when a carbohydrate is formed by linking two monosaccharides by a condensation reaction, we get water plus which of the following?

When two monosaccharides link via condensation, water plus a disaccharide forms.

This straightforward reaction builds carbohydrates like maltose from glucose units.

Core Answer

A disaccharide is produced alongside water.

Reaction Breakdown

• In a condensation reaction (aka dehydration synthesis), the -OH from one monosaccharide's anomeric carbon bonds with -H from another's, releasing H₂O.

• Example: Two α-glucose → maltose + H₂O, via α-1,4 glycosidic link.

• Reverse (hydrolysis) adds water to break it back.

Real Examples

Disaccharide| Monosaccharides Linked| Bond Type| Source 59
---|---|---|---
Maltose| Glucose + Glucose| α-1,4| Starch digestion
Sucrose| Glucose + Fructose| α-1,2β| Table sugar
Lactose| Galactose + Glucose| β-1,4| Milk sugar

Why It Matters

This builds polysaccharides like starch/cellulose from 100s–1000s of units—key for energy storage.

TL;DR: Water + disaccharide.

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