COMEDK · Chemistry · 30. Biomolecules
Which among the following is an INCORRECT statement?
- A Polysaccharides are known as non-sugars as they are not sweet in taste
- B In monosaccharides, aldoses are reducing sugars while ketoses are non-reducing sugars
- C In D (+) Glucose, D represents the configuration similar to D-Glyceraldehyde
- D D (-) fructose forms a five membered ring known as furanose which is in analogy with the compound furan
Answer & Solution
Correct Answer
(B) In monosaccharides, aldoses are reducing sugars while ketoses are non-reducing sugars
Step-by-step Solution
Detailed explanation
All monosaccharides, whether aldoses or ketoses, are reducing sugars. Ketoses such as fructose can reduce Tollens' and Fehling's reagents because they undergo isomerization to aldoses in the alkaline medium via an enediol intermediate. Thus, the statement that ketoses are…
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