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D-glucose, D-fructose, and D-mannose can form the same osazone because they all contain the same functional groups that react with phenylhydrazine to produce osazones. The osazone formation involves the carbonyl group of the reducing sugars reacting with phenylhydrazine, leading to the same structure of the resulting osazone compound due to the rearrangement and isomerization of these sugars. Consequently, despite their structural differences, the final osazone has the same molecular characteristics and thus appears identical in tests.

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4d ago

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Why glucose and fructose form same osazone?

Glucose and fructose can both form the same osazone, 2,4-dinitrophenylhydrazone, due to their structural similarity. Both sugars have a carbonyl group that reacts with 2,4-dinitrophenylhydrazine to form a hydrazone derivative. This reaction produces a yellow crystalline compound that is characteristic of osazones.


What is the clinical significance of osazone test?

For identification purposes the carbonyl and adjacent alcohol functions will form phenylhydrazine derivatives known as osazones, which give characteristic melting points and exhibit definite crystalline structure. It should be noted that glucose , fructose and mannose yield the same osazone since the difference in structure and configuration about carbon atoms 1 and 2 are abolished.


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to give advice is to give a suggestion