The most common monomer of carbohydrates is a molecule of -

Options

A. Glucose
B. Fructose
C. Ribose
D. Deoxyribose

Answer

**Step-by-Step Solution:**

1. **Understanding Monomers**: Begin by defining what monomers are. Monomers are the simplest form of carbohydrates and serve as the building blocks for more complex carbohydrates.

2. **Identifying Common Monomers**: Recognize that carbohydrates can have different types of monomers. The most common monomers include glucose, fructose, ribose, and deoxyribose.

3. **Determining the Most Common Monomer**: Among these monomers, glucose is identified as the most common. It is widely found in nature and serves as a primary energy source for many organisms.

4. **Chemical Formula of Glucose**: Note that the chemical formula for glucose is C6H12O6, which indicates it is a hexose sugar (a six-carbon sugar).

5. **Contextualizing Glucose**: Understand that glucose is not only abundant in plants but also plays a crucial role in cellular respiration and energy production in both plants and animals.

6. **Conclusion**: Based on the information gathered, conclude that the most common monomer of carbohydrates is glucose.

**Final Answer**: The most common monomer of carbohydrates is a molecule of glucose.

---