Select the matched one

Options

A. Biolistics - bioreactor
B. Thermus aquaticus - T-DNA
C. Plasmid DNA - vector
D. EcoRI - restriction exonuclease

Answer

To solve the question of selecting the correctly matched pair from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- First, we need to understand what each term in the options refers to. This includes biolistic, bioreactor, Thermus aquaticus, T-DNA, plasmid DNA vector, and Echori.

2. **Analyze Each Option**:
- **Option 1: Biolistic and Bioreactor**:
- Biolistic refers to a method for delivering foreign DNA into cells.
- A bioreactor is an apparatus for growing organisms.
- These two do not match because they refer to different processes.

- **Option 2: Thermus Aquaticus and T-DNA**:
- Thermus aquaticus is a bacterium from which Taq polymerase is derived.
- T-DNA refers to transferred DNA associated with Agrobacterium tumefaciens, not Thermus aquaticus.
- Therefore, this option is also incorrect.

- **Option 3: Plasmid DNA Vector**:
- Plasmid DNA is indeed a small circular double-stranded DNA molecule that can be used as a vector in molecular biology to transfer genetic material between cells.
- This option is correctly matched.

- **Option 4: Echori**:
- Echori (or EcoRI) is a restriction endonuclease, meaning it cuts DNA at specific sequences.
- It is not an exonuclease, which removes nucleotides from the ends of DNA.
- Thus, this option is also incorrect.

3. **Select the Correct Answer**:
- After analyzing all options, the only correctly matched pair is **Plasmid DNA Vector**.

### Final Answer:
The correctly matched option is **Plasmid DNA Vector**.

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