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aldose vs. ketose

aldose vs. ketose: What's the difference?

Aldose and ketose are both simple sugars (monosaccharides). They differ in composition: aldose contains an aldehyde (CHO) group (consisting of carbon, hydrogen, and oxygen), while ketose contains a ketone (CO) group (consisting of carbon and oxygen). Fructose is a ketose; glucose and ribose are aldoses. The suffix -ose is used in the names of sugars and carbohydrates. The ald- in aldose comes from aldehyde; the keto- in ketose comes from ketone.

[ al-dohs ]
  1. a sugar containing the aldehyde group or its hemiacetal equivalent.
[ kee-tohs ]
  1. a monosaccharide that contains a ketone group.

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