AP BIOLOGY

Detailed explanation-1: -Disaccharides (di-= “two”) form when two monosaccharides join together via a dehydration reaction, also known as a condensation reaction or dehydration synthesis.

Detailed explanation-2: -The monosaccharide consists of single unit which contains carbon chain of three to six carbon. They can combine through glycosidic bonds to form larger carbohydrates.

Detailed explanation-3: -A condensation reaction between two monosaccharides forms a glycosidic bond. Disaccharides are formed by the condensation of two monosaccharides: maltose is a disaccharide formed by condensation of two glucose molecules. sucrose is a disaccharide formed by condensation of a glucose molecule and a fructose molecule.

Detailed explanation-4: -Two monosaccharides undergo a condensation reaction to form a disaccharide. The bond that is formed after the condensation reaction is called glycosidic bonds. Examples of these condensation reactions are the formation of lactose from glucose and galactose, and the formation of sucrose from fructose and glucose.

Detailed explanation-5: -Monosaccharides such as glucose can be linked together in condensation reactions. For example, sucrose (table sugar) is formed from one molecule of glucose and one of fructose, as shown below. Molecules composed of two monosaccharides are called disaccharides.