Fructose is an example of :

Biomolecules PYQ — JEE Main 2021 · 17 Mar · Shift 2 · Q11 with Solution

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Correct answer: C

Identify what fructose is

Fructose is a monosaccharide sugar.
Classify by functional group

Fructose contains a ketone functional group in its open-chain form, so it is a ketose.
Classify by number of carbon atoms

Fructose has 6 carbon atoms, so it is a hexose.
Combine both classifications

Therefore, fructose is a ketohexose.
Check the options
- A: Heptose $\rightarrow$ 7-carbon sugar, incorrect
- B: Pyranose $\rightarrow$ refers to a 6-membered ring form; fructose is not generally classified primarily this way here, incorrect
- C: Ketohexose $\rightarrow$ correct
- D: Aldohexose $\rightarrow$ fructose is not an aldehyde sugar, incorrect

Hence, the correct answer is C.

View written solutionFree

Correct answer: C

Identify what fructose is

Fructose is a monosaccharide sugar.
Classify by functional group

Fructose contains a ketone functional group in its open-chain form, so it is a ketose.
Classify by number of carbon atoms

Fructose has 6 carbon atoms, so it is a hexose.
Combine both classifications

Therefore, fructose is a ketohexose.
Check the options
- A: Heptose $\rightarrow$ 7-carbon sugar, incorrect
- B: Pyranose $\rightarrow$ refers to a 6-membered ring form; fructose is not generally classified primarily this way here, incorrect
- C: Ketohexose $\rightarrow$ correct
- D: Aldohexose $\rightarrow$ fructose is not an aldehyde sugar, incorrect

Hence, the correct answer is C.