Question

When two monosaccharides join to form a disaccharide, they join at their closest __ groups. Option 1: Hydroxyl groups Option 2: Amino groups Option 3: Phosphate groups Option 4: Carbonyl groups

Answer 1

When two monosaccharides join to form a disaccharide, they join at their closest Hydroxyl groups. Thus the correct Option is 1.

Step-by-step explanation:

When two monosaccharides join to form a disaccharide, they join at their closest hydroxyl groups. Monosaccharides, the building blocks of carbohydrates, contain hydroxyl (-OH) groups attached to their carbon atoms. The reaction that links two monosaccharides to form a disaccharide is a dehydration synthesis, where a water molecule is removed, and the hydroxyl groups from the monosaccharides combine to form a covalent bond.

In the process of forming a disaccharide, the hydroxyl group from one monosaccharide combines with the hydrogen atom from the hydroxyl group of another monosaccharide, resulting in the release of a water molecule. This linkage forms a glycosidic bond, creating a larger sugar molecule. The specific type of glycosidic bond formed will depend on which hydroxyl groups are involved and their spatial arrangement.

Understanding the chemistry of monosaccharide linkage is fundamental in comprehending the structure and function of complex carbohydrates, such as disaccharides and polysaccharides, in biological systems.

Answer 2

When two monosaccharides join to form a disaccharide, they join at their closest hydroxyl groups. Option 1: Hydroxyl groups.

Step-by-step explanation:

Monosaccharides, the simplest form of carbohydrates, contain multiple hydroxyl (-OH) groups. When two monosaccharides undergo a condensation reaction to form a disaccharide, a molecule of water is eliminated, and the hydroxyl groups from each monosaccharide combine to create a glycosidic bond.

This bond typically forms between the hydroxyl group on the anomeric carbon of one monosaccharide and the hydroxyl group on a carbon of another monosaccharide. The other options—amino groups, phosphate groups, and carbonyl groups—do not play a primary role in the formation of disaccharides. Therefore, option 1, hydroxyl groups, is the correct answer.