STANDARD Chemistry Carbohydrates MCQ Question
The given structures (I) and (II) represent configuration of the simplest sugar glyceraldehyde. Which of the following statements is not correct for the structures?
CHO
|
H — C — OH
|
CH₂OH
(I)
CHO
|
HO — C — H
|
CH₂OH
(II)
(I) represents D-form while (II) represents L-form of glyceraldehyde.
The sugars having same configuration as D-glyceraldehyde are designated as D-sugars.
Natural glucose and fructose are D-forms.
D is dextrorotatory while L is laevorotatory enantiomer.
Correct Answer
Detailed Explanation
The D and L nomenclature is based on the configuration of the molecule, not its optical activity. D and L forms can be either dextrorotatory or laevorotatory.
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