Chemistry - Biomolecules Question with Solution | TestHub
Consider the following statements :
Options:(select one or more)
Answer:
Solution:
(A) Monosaccharides are optically active polyhydroxy carbonyl compounds.
Correct
Monosaccharides contain multiple –OH groups and either an aldehyde or ketone group, and most are optically active due to chiral carbon atoms.
(B) Fructose cannot reduce Fehling's solution, because it is a ketohexose.
Incorrect
Fructose does reduce Fehling’s solution.
Even though it is a ketohexose, in alkaline medium it tautomerizes to aldoses (like glucose/mannose), which can reduce Fehling’s reagent.
(C) α-D(+) glucose and β-D(+) glucose are anomers.
Correct
They differ only at the anomeric carbon (C1 in glucose), so they are anomers.
(D) D-glucose and D-mannose are C-2 epimers.
Correct
They differ only at carbon-2 configuration → hence C-2 epimers.