Choose the Term That Correctly Describes the Relationship Between These

Question

Choose the term that correctly describes the relationship between these two sugar molecules:

A)structural isomers 
B)cis-trans isomers 
C)enantiomers 
D)isotopes

Accepted Answer

Structural isomers are molecules with the same molecular formula but different structural arrangements. The two sugar molecules shown are both glucose, but they differ in their structural arrangement, therefore they are structural isomers. Cis-trans isomers are a type of stereoisomerism that describes molecules with a double bond and two different groups on each side, enantiomers are stereoisomers that are mirror images of each other, and isotopes are atoms of the same element with a different number of neutrons. These do not apply to sugar molecules.