Answer:
The correct answer is - The glucose chain contains an aldehyde functional group, while the fructose chain contains a ketone functional group.
Step-by-step explanation:
Glucose and fructose both are simple monosacchrides that have the same molecular formula with 6 carbon chains and both sugars contain double bonds at the end of the chain.
Fructose have a ketone functional group end of the 6 carbon chain of the molecule whereas the glucose carries an aldehyde group as the functional group in the molecule.