OPTICAL ISOMERISM
* The enantiomeric monosaccharides by virtue of their content of asymmetric carbon atom can rotate the plane-polarized light either to right or left.
* The monosaccharides that rotate this light to right are called dextrorotatory(+type)
* Those rotating this light to left are called levorotatory(- type).
* Glucose is dextrorotatory(+), while fructose is levorotatory(-)
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