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Biomolecules — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryBiomolecules3 Marks
Question
What is essentially the difference between $\alpha$-glucose and $\beta$-glucose? What is meant by pyranose structure of glucose?
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Answer

$\alpha$-glucose & $\beta$ glucose differ only in the orientation of the hydroxyl group at C1  position. In $\alpha$-glucose the OH group is on right-hand side at C1 position whereas in $\beta$-glucose the OH group is on left-hand side at C1 position. The six-membered hetero cyclic structure of glucose is called pyranose structure.

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