Macromolecule most common in plant cell walls is

Options

A. Glycogen
B. Starch
C. Protein
D. Cellulose

Answer

**Step-by-Step Solution:**

1. **Identify the Question:** The question asks for the macromolecule that is most common in plant cell walls among the given options: glycogen, starch, protein, and cellulose.

2. **Evaluate Each Option:**
- **Glycogen:** This is a polysaccharide that serves as a form of energy storage in animals. It is not found in plant cell walls.
- **Starch:** This is also a polysaccharide and serves as an energy storage molecule in plants. However, it is not a structural component of plant cell walls.
- **Protein:** While proteins are essential macromolecules in cells, they are not the primary component of plant cell walls.
- **Cellulose:** This is a polysaccharide that is a major structural component of plant cell walls.

3. **Determine the Correct Answer:** Among the options, cellulose is the correct answer because it is the most common macromolecule found in plant cell walls. It provides structural support to the plant.

4. **Conclusion:** The macromolecule most common in plant cell walls is **cellulose**.

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