Sugars are technically called carbohydrates, referring to the fact that their formulae are only multiple of 
. Hexoses therefore have six carbons, twelve hydrogens and six oxygen atoms. Glucose is a hexose. Choose from among the following another hexose.
Text Solution
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Fructose is a ketohexose. Its carbon is attached to an hydrogen atom by a single bond and to an oxygen atom by a double bond.
Erythrose is a tetrose carbohydrate 
. Its a part of tetrose family and possesses one aldehyde group.
Ribulose is a ketopentose, containing five carbon atoms and includes 'ketone' as a functional group.
Ribose is a pentose which is a major component of DNA and RNA.
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