DNA is unique among molecules in that it can:

Options

A. form multipolymer complexes
B. come apart and re-form
C. withstand very high temperatures
D. replicate itself

Explanation

To solve the question "DNA is unique among molecules in that it can:", we need to analyze the options provided and understand the properties of DNA.

### Step-by-Step Solution:

1. **Understand the Properties of DNA**:
- DNA (deoxyribonucleic acid) is the genetic material in many organisms. It carries genetic information in the form of genes.
- DNA has a double helix structure, which is stable and less reactive compared to other molecules.

2. **Evaluate the Options**:
- **Option 1: Form a multipolymer complex**: While DNA can interact with proteins and other molecules, forming complexes, this is not a unique property.
- **Option 2: Come apart and reform**: DNA can denature (come apart) under certain conditions (like high temperature) and can reform when conditions are favorable. However, this is not its unique property.
- **Option 3: Stand very high temperature**: DNA can withstand some heat, but it can denature at high temperatures due to the breaking of hydrogen bonds. This is not a unique feature.
- **Option 4: Replicate itself**: DNA has the unique ability to replicate itself, meaning it can make an exact copy of itself during cell division. This is a fundamental property of DNA and is essential for inheritance.

3. **Conclusion**:
- After evaluating all the options, the unique property of DNA among the given choices is that it can **replicate itself**. Therefore, the correct answer is **Option 4: Replicate itself**.

### Final Answer:
DNA is unique among molecules in that it can replicate itself.

---