Question

What are the two monomers of maltose?

• A. $\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}\mathrm{and}\mathrm{\alpha }-\mathrm{D}-\mathrm{Galactose}$
• B. $\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}\mathrm{and}\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}$
• C. $\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}\mathrm{and}\mathrm{\alpha }-\mathrm{D}-\mathrm{Fructose}$
• D. $\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}\mathrm{and}\mathrm{\beta }-\mathrm{D}-\mathrm{Glucose}$

Answer 1

The correct option is B

$\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}\mathrm{and}\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}$

Explanation for the correct options:

(B) $\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}\mathrm{and}\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}$

• Based on saccharides carbohydrates are classified into monosaccharides, disaccharides, and polysaccharides.
• When two monomers are joined it undergoes condensation or dehydration reaction and forms disaccharides.
• Examples of disaccharides are maltose, lactose, and sucrose.
• In Maltose, the glycosidic oxygen atom of one glucose is $\alpha$bonded to c-$4$ of another glucose, it is $\alpha$1,4-glycoside.

Final answer: Hence option (B) is correct.,$\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}\mathrm{and}\mathrm{\alpha }-\mathrm{D}-\mathrm{Glucose}$ these are the two monomers of maltose.