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