Which of the following is not a carbohydrate ?

Question

Accepted Answer

Stevia is the correct answer as it is not a carbohydrate. Here is a detailed explanation:

1. **Stevia**: Stevia is a natural sweetener derived from the leaves of the Stevia rebaudiana plant. It contains compounds called steviol glycosides, which are responsible for its sweet taste. These compounds are not carbohydrates; instead, they are diterpene glycosides. Stevia is used as a sugar substitute because it provides sweetness without the calories associated with carbohydrates. Therefore, it is correct to say that Stevia is not a carbohydrate.

2. **Starch**: Starch is a carbohydrate. It is a polysaccharide composed of numerous glucose units joined together. Starch is a major source of energy in the human diet and is found in foods such as potatoes, rice, and corn. It is a classic example of a carbohydrate, making it incorrect to say that starch is not a carbohydrate.

3. **Cellulose**: Cellulose is also a carbohydrate. It is a polysaccharide consisting of a linear chain of glucose molecules. Cellulose is a major component of plant cell walls and provides structural support to plants. Although humans cannot digest cellulose, it is still classified as a carbohydrate. Therefore, it is incorrect to say that cellulose is not a carbohydrate.

4. **Lactose**: Lactose is a carbohydrate. It is a disaccharide composed of glucose and galactose units. Lactose is commonly found in milk and dairy products and is often referred to as milk sugar. As a carbohydrate, it provides energy to the body. Thus, it is incorrect to say that lactose is not a carbohydrate.

In summary, Stevia is not a carbohydrate, while starch, cellulose, and lactose are all carbohydrates. This supports the given correct answer, Option 1, as the correct choice.