Question

Which one of the following is a disaccharide?
\[ \text{Glucose, Lactose, Amylose, Fructose} \]

Hint:

Disaccharides are made up of two monosaccharides joined by a glycosidic bond. Lactose is an example of a disaccharide.

Answer 1

To solve the problem, we need to identify the disaccharide from the given options: Glucose, Lactose, Amylose, and Fructose.

1. Understanding Disaccharides:
Disaccharides are carbohydrates composed of two monosaccharide units joined by a glycosidic bond. Common disaccharides include sucrose, lactose, and maltose. These sugars can be broken down into their monosaccharide components through hydrolysis.

2. Examining the Options:
- Glucose: Glucose is a monosaccharide, not a disaccharide. It is a simple sugar that serves as a primary energy source in living organisms. - Lactose: Lactose is a disaccharide, formed by the combination of one molecule of glucose and one molecule of galactose. It is commonly found in milk. - Amylose: Amylose is a polysaccharide, a component of starch, and consists of long chains of glucose units. It is not a disaccharide. - Fructose: Fructose is a monosaccharide, not a disaccharide. It is commonly found in fruits and is used as a sweetener.

3. Final Answer:
The disaccharide from the given options is Lactose.