NUTRITION
CARBOHYDRATES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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OH group at carbon 1
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OH group at carbon 4
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lack of O at carbon 3
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OH group at carbon 2
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Detailed explanation-1: -The main difference between alpha and beta glucose is that the –OH group attached to the first carbon atom in alpha glucose is located on the same side as the –CH2OH group whereas the –OH group attached to the first carbon atom of in beta glucose is located on the opposite side from the –CH2OH group.
Detailed explanation-2: -The key difference between alpha () and beta () glucose is the orientation of hydroxyl (-OH) group attached to the first carbon atom. The two dimensional graphical representation of these isomeric glucose structures shows that the -glucose has (1-hydroxyl) and (4-hydroxyl) orientations on the same side.
Detailed explanation-3: - glucose and glucose are structurally identical except with the difference in the “configuration” of the anomeric carbon atom. So, they are also called as anomers.
Detailed explanation-4: -Alpha glucose has an-OH [hydroxyl] group (red sphere attached to white sphere) that points “downwards", away from the ring, whereas the-OH on carbon 1 of beta glucose is above the ring.