List two essential characteristics of vectors

Explanation

### Step-by-Step Text Solution

1. **Understanding Vectors**: Vectors are small DNA molecules, such as plasmids or viruses, that are used to carry foreign DNA into a host cell. They play a crucial role in molecular cloning.

2. **Characteristics of Vectors**: Vectors have several essential characteristics that make them suitable for their role in biotechnology.

3. **First Essential Characteristic**:
- **Easy to Link with Foreign DNA**: A vector must have the ability to easily link or incorporate the desired foreign DNA. This is crucial for the successful transfer of genetic material into the host organism.
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