| The given structures (I) and (II) represent configuration of the simplest sugar glycer-aldehyde. Which of the following statements is not correct for the structures? |
| \[\underset{\left( I \right)}{\mathop{H-\underset{\begin{smallmatrix} |\\ CH{{ }_{2}}OH \end{smallmatrix}}{\overset{\begin{smallmatrix} CHO\\ | \end{smallmatrix}}{\mathop{C}}}\,-OH}}\,\,\,\,\,\underset{\left( II \right)}{\mathop{HO-\underset{\begin{smallmatrix} |\\ CH{{ }_{2}}OH \end{smallmatrix}}{\overset{\begin{smallmatrix} CHO\\ | \end{smallmatrix}}{\mathop{C}}}\,-H}}\,\] |
A) (I) represents D-form while (II) represents L-form of glyceraldehyde.
B) The sugars having same configuration as D-glyceraldehyde are designated as D-sugars.
C) Natural glucose and fructose are D-forms.
D) D is dextrorotatory while L is laevorotatory enantiomer.
Correct Answer: D
Solution :
D represents OH group on the right side of lowest asymmetric C-atom while L represents OH group on the left.
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