Question

Which of the following carbohydrates is not a monosaccharide sugar? A. galactose B. sucrose C. mannose...

Which of the following carbohydrates is not a monosaccharide sugar?

A. galactose

B. sucrose

C. mannose

D. glucose

E. fructose

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Answer #1

The answer is ---- B. Sucrose.

EXPLANATION :

Sucrose is not a monosaccharide sugar while it is disaccharide sugar . Each molecule of sucrose consists of two molecules of simple sugars namely glucose and fructose. These sugars are linked by glycosidic linkages and it is also called double sugar or Bivose.

While the other options include-

  • Galactose , glucose , fructose are simple sugars with the same molecular formula C6H12O6 , while the arrangement of atoms differ in them and hence differ in structural formula.
  • Mannose too is a sugar monomer of aldohexose series of carbohydrates. It is produced by the human body and is needed in metabolism . It is required in glycosation of proteins.

Therefore, the answer is Sucrose.

Thank you.

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