which substance is not a carbohydrate ?

Options

A. starch
B. glycogen
C. Wax
D. Glucose

Answer

To determine which substance is not a carbohydrate among the options provided (starch, glycogen, wax, and glucose), we can analyze each substance step by step.

### Step-by-Step Solution:

1. **Identify Starch**:
- Starch is a polysaccharide made up of numerous glucose units linked together. It serves as a storage form of energy in plants.
- **Conclusion**: Starch is a carbohydrate.

2. **Identify Glycogen**:
- Glycogen is also a polysaccharide composed of glucose units. It functions as the primary storage form of glucose in animals.
- **Conclusion**: Glycogen is a carbohydrate.

3. **Identify Glucose**:
- Glucose is a simple sugar (monosaccharide) and is one of the primary carbohydrates used by living organisms for energy.
- **Conclusion**: Glucose is a carbohydrate.

4. **Identify Wax**:
- Wax is a type of lipid, which is different from carbohydrates. It is composed of long-chain fatty acids and alcohols, and it serves various functions, including protection and waterproofing.
- **Conclusion**: Wax is not a carbohydrate.

### Final Answer:
The substance that is not a carbohydrate among the options given is **wax**.

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