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Question
............ is a sugar with five membered ring.
............ is a sugar with five membered ring.
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Solution
The correct option is B Furanose
Carbohydrate monosaccharides can occur in open chain or closed chain form. To form a closed chain structure, there is intramolecular bond formation between the aldehyde or keto group and alcoholic group. Depending on the carbon atoms between which reaction takes place two types of ring structures are possible- furanose (five-membered ring system- four carbon atoms and one oxygen atom) and pyranose (six-membered ring- five carbon atoms and one oxygen atom).
Carbohydrate monosaccharides can occur in open chain or closed chain form. To form a closed chain structure, there is intramolecular bond formation between the aldehyde or keto group and alcoholic group. Depending on the carbon atoms between which reaction takes place two types of ring structures are possible- furanose (five-membered ring system- four carbon atoms and one oxygen atom) and pyranose (six-membered ring- five carbon atoms and one oxygen atom).
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