Monosaccharide Practice Problems

Determine the number of possible stereoisomers for ketooctose.

Determine the number of possible stereoisomers for aldooctose.

Classify the below-given monosaccharides based on their functional groups and the number of carbon atoms (such as ketopentose and aldohexose).
a. D-fructose
b. D-galactose
c. L-xylose
d. L-ribose
e. L-threose
f. L-glucose
g. L-erythrose

True or False. A ketohexose has 4 asymmetric carbons and 16 stereoisomers, while an aldohexose has 3 asymmetric carbons and 8 stereoisomers.

Determine the number of possible stereoisomers for ketopentose.

Among the four given aldotetroses, which are C-2 epimers, and which are enantiomers?

Refer to the figure provided to determine the sugar that corresponds to the following:

i. the enantiomer of D-lyxose

ii. the C2 epimer of D-ribose

An unknown sugar molecule has been found to have a molar mass of around 90 g/mol and show no optical activity. What could be its possible structure?

Propose a suitable mechanism for the cleavage of tagatose-1,6-bisphosphate in the presence of hydroxide ions.