Monosaccharide Isomerism
Easychemistry
Glucose and fructose are:
Select the correct option:
Solution
Incorrect! Answer:
Functional group isomers
- Molecular Formula: Both Glucose and Fructose share the same molecular formula, C6H12O6.
- Identify Structures:
- Glucose: An aldohexose (contains an aldehyde group −CHO at C-1).
- Fructose: A ketohexose (contains a keto group >C=O at C-2).
- Isomerism Type: Since they differ in the nature of their functional groups while having the same molecular formula, they are functional group isomers.
- Definitions of others:
- Epimers: Differ at only one chiral center other than the anomeric carbon (e.g., Glucose and Galactose).
- Anomers: Differ in configuration specifically at the anomeric carbon (C−1 for glucose).
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About This Question
- Subject
- chemistry
- Chapter
- biomolecules
- Topic
- monosaccharide isomerism
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Functional group isomers
- Molecular Formula: Both Glucose and Fructose share the same molecular formula, C6H12O6.
- Identify Structures:
- Glucose: An aldohexose (contains an aldehyde group −CHO at C-1).
- Fructose: A ketohexose (contains a keto group >C=O at C-2).
- Isomerism Type: Since they differ in the nature of their functional groups while having the same molecular formula, they are functional group isomers.
- Definitions of others:
- Epimers: Differ at only one chiral center other than the anomeric carbon (e.g., Glucose and Galactose).
- Anomers: Differ in configuration specifically at the anomeric carbon (C−1 for glucose).
This easy difficulty chemistry question is from the chapter biomolecules, covering the topic of monosaccharide isomerism. It appeared in the 2025 exam.
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