question_answer

Which one of the following sets of monosaccharide?s forms sucrose?

A)                 \[\text{-}\]D-galactopyranose and \[\text{-}\]D-glucopyranose                

B)                   \[\text{-}\]D-glucopyranose and \[\text{-}\]D-fructofuranose                

C)                   \[\text{-}\]D-glucopyranose and \[\text{-}\]D-fructofuranose                

D)                   \[\text{-}\]D-glucopyranose and \[\text{-}\]D-fructopyranose

Correct Answer: B

Solution :

Sucrose is composed of \[\alpha \]-D-glucopyranose and a \[\text{-D-}\]fructofuranose units which are joined by \[\], \[\text{-}\]glycoside linkage between C-1 of the glucose unit and C-2 of the fructose unit.