Question

Raffinose is a :

• A. trisaccharide
• B. monosaccharide
• C. disaccharide
• D. none of the above

Answer 1

Answer: (A)

trisaccharide

Answer 2

Monosaccharides do not hydrolyse, disaccharides give two molecules of monosaccharides, trisaccharides give three molecules of monosacharides and polysaccharides give many molecules of monosaccharides on hydrolysis.
$\therefore$ Raffinose is trisaccharide.
$\underset{\text{raffinose}}{C_{18}H_{32}O_{16}} + H_2O \to$ glucose + fructose + galactose