Aldoses vs. Ketoses

Aldoses vs. Ketoses

Monosaccharides are either aldehyde or ketone derivatives of straight chain polyhydroxy alcohols containing at least three carbon atoms.

Structure difference an aldehyde and a ketone

First, let’s revisit the difference between an aldehyde and a ketone:

Structure-difference-an-aldehyde-and-a-ketone

If the carbonyl group of a sugar is an aldehyde, the sugar is called an aldose. If the carbonyl group of a sugar is a ketone, the sugar is called a ketose.

An example of an aldose:

Aldehyde-chemistryscore

An example of a ketose:

Ketone-chemistryscore

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