Question

what forms after the glycosidic linkage reaction between glucose and galactose is complete?
a) lactose
b) water and fructose
c) mannose
d) water and lactose

Explanation:

A glycosidic linkage reaction between glucose and galactose is a dehydration synthesis (condensation) reaction. In this reaction, a molecule of water ($H_2O$) is removed, and the two monosaccharides (glucose and galactose) are linked to form a disaccharide. The disaccharide formed from glucose and galactose is lactose. So the products of the reaction are water and lactose. Option a is incorrect because it does not mention water (the by - product). Option b is incorrect as fructose is not involved in this reaction. Option c is incorrect as mannose is a different monosaccharide and not formed from this reaction.

Answer:

d) Water and lactose