Disaccharides are composed of two monosaccharide units. From the following, which is NOT a disaccharide?
A. Amylose.
B. Maltose.
C. Sucrose.
D. Lactose.
Amylose is a water soluble fraction of starch, a polysaccharide. Maltose (malt sugar) will yield two molecules of glucose. Sucrose (cane sugar) will yield glucose and fructose, while lactose (milk sugar) will yield glucose and galactose.