The open-chain sugar shown is best classified as

Aa ketohexose
Ban aldohexose
Ca ketopentose
Dan aldotetrose

Answer: A

The carbonyl carbon is C-2, flanked by carbon atoms on both sides, so the sugar is a ketose; the chain has six carbons, so it is a hexose. The compound is D-fructose, a ketohexose.

Practice Biomolecules More on Monosaccharide classification from drawn structures

Previous questionNext question

More questions on Monosaccharide classification from drawn structures

The monosaccharide shown is classified as NEET level
Taking the carbonyl group as C-1 at the top, the sugar shown is best described as NEET level
The reference compound shown has the D configuration. Which of Structures A to D is a D-aldopentose? JEE Main level
The reference compound shown is the simplest ketose. Which of Structures A to D is a ketohexose? JEE Main level
The sugar shown is oxidised by bromine water. Which of Structures A to D is the major product? JEE Main level
The sugar shown is heated for a long time with excess HI and red phosphorus. Which of Structures A to D is the final product? JEE Main level