Question

Which of the following is not an oligosaccharide?

• A. Xylose
• B. Maltose
• C. Raffinose
• D. Stachyrose

Answer 1

The correct option is A Xylose

Xylose is not an oligosaccharide. It is a monossaccharide. Xylose is a sugar first isolated from wood, and named for it. Xylose is classified as a monosaccharide of the aldopentose type, which means that it contains five carbon atoms and includes a formyl functional group. Chemical formula of xylose is $C_5{H}_{10}{O}_5$. Maltose, raffinose and stachyose are oligosaccharides. Oligosaccharides are further divided into di, tri or tetrasaccharides. Maltose is disaccharides, raffinose is trisaccharides and stachyose is tetrasaccharides.