Final answer:
D-Galactose and D-Glucose form the heterodisaccharide lactose. They cannot form other heterodisaccharides with each other, but they can form other disaccharides with different monosaccharides such as fructose.
Step-by-step explanation:
In addition to lactose, D-Galactose and D-Glucose can form several other heterodisaccharides depending on their structure and the type of glycosidic linkage. However, from the information provided, there are several errors in the combinations described, suggesting misconceptions about the formation of disaccharides. To clarify, the correct combinations of monosaccharides to form disaccharides are as follows: glucose and fructose combine to form sucrose; glucose and galactose combine to form lactose; and two glucose monomers combine to form maltose. From these established pairs, no additional heterodisaccharides can be formed between D-Galactose and D-Glucose apart from lactose. It is important to recognize that glucose, galactose, and fructose are all monosaccharides with the same molecular formula but are isomers of each other, differing in the arrangement of atoms. This structural difference is what gives each disaccharide its unique properties.