Final answer:
The disaccharide made up of two glucose molecules is maltose. Hence the correct option is E.
Step-by-step explanation:
Maltose is a disaccharide composed of two glucose molecules linked together. It is formed through the condensation reaction between two glucose units, resulting in the elimination of a water molecule. The glycosidic bond connecting the two glucose molecules is an α(1→4) linkage.
The other options represent different disaccharides with their respective compositions:
A. Sucrose: composed of glucose and fructose.
B. Lactose: composed of glucose and galactose.
C. Dextrose: another term for glucose, a monosaccharide.
D. Galactose: a monosaccharide, not a disaccharide.
Therefore, among the options, maltose specifically fits the description of a disaccharide made up of two glucose molecules.