<prompt> Which of the following has no asymmetric carbon?GlucoseGlyceraldehydeDihydroxyacetoneFructose  <response>: Option a- Glucose has 4 chiralasymmetric carbons C2, C3, C4 and C5 Option b- Glyceraldehyde has 1 chiral carbon C2 Option d- Fructose has 3 chiral carbons C3, C4 and C5 Option c Dihydroxyacetone is the only carbohydrate which has no asymmetric carbon EXTRA EDGE Any compound having asymmetric carbon shows both structural and optical isomerism. Carbohydrates and amino acids have asymmetric carbon so, both structural and optical isomerism present. The number of Asymmetric carbons are always one less in keto form as compared to aldehyde form. 