Question

What is maltose made up of?

• A. $\alpha$-glucopyranose and $\beta$-glucopyranose
  
• B. $\alpha$-glucopyranose and $\alpha$-glucopyranose
  
• C. $\beta$-glucopyranose and $\beta$-glucopyranose
• D. $\alpha$-galactopyranose and $\alpha$-galactopyranose

Answer 1

The correct option is B $\alpha$-glucopyranose and $\alpha$-glucopyranose

Maltose is a disaccharide made up of two units of alpha-glucopyranose that are joined with alpha 1->4 glycosidic bond. Glucopyranose is a pyranose form of glucose in which carbon atom 1 and 5 are bridged by the oxygen atom. It is a reducing sugar. It is commonly found in germinating grain.

Thus, the correct answer is option B.