Kindly explain the difference b/w glucose and fructose as they both have same chemical formula.

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Solution

The two compounds differ in their molecular structure.
Glucose is an aldohexose. Its carbon is attached to a hydrogen atom by a single bond and an oxygen atom by a double bond.
Fructose is a ketohexose. Its carbon is attached only to an oxygen atom by a single bond.

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Statement 1: Instead of glucose, other forms of sugar like fructose or galactose can also be used to obtain energy during respiration.

Statement 2: Fructose and galactose have the same chemical formula of C6H12O6 as that of glucose.

x, y

z

x + y + z = ?

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