What are macromolecules ? Give examples .

Explanation

**Step-by-Step Solution:**

1. **Definition of Macromolecules:**
- Macromolecules are large molecules that are essential for biological functions. The term "macro" indicates that these molecules are large in size compared to other molecules.

2. **Formation of Macromolecules:**
- Macromolecules are formed by the process of polymerization, which involves the joining together of smaller units called monomers. This means that many smaller molecules combine to form a larger structure.

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