Which is correctly matched?

Options

A. Agrobacterium tumifaciens - Restriction endonucleus
B. pBR322-Enzymes
C. Thermus aquaticus -Bt gene
D. Restriction endonuclease- Molecular scissors

Answer

To determine which option is correctly matched, we need to analyze each pairing provided in the question.

1. **Agrobacterium and Tumeficiens**:
- Agrobacterium tumefaciens is a bacterium known for its role in plant genetic engineering. It contains a tumor-inducing plasmid (Ti plasmid) that can transfer genes into plant cells. However, this pairing does not match with any specific function or enzyme.

2. **Restriction Endonuclease and PBR322**:
- Restriction endonucleases are enzymes that cut DNA at specific sequences, often referred to as "molecular scissors." PBR322 is a plasmid vector used for cloning, but it is not an enzyme. Therefore, this pairing is incorrect.

3. **Thermus Aquaticus and Bt Gene**:
- Thermus aquaticus is a bacterium from which Taq polymerase is derived, used in PCR (Polymerase Chain Reaction). The Bt gene, however, is derived from Bacillus thuringiensis, which is known for its insecticidal properties. Thus, this pairing is also incorrect.

4. **Restriction Endonuclease and Molecular Scissors**:
- This pairing is correct. Restriction endonucleases are indeed referred to as molecular scissors because they cut DNA at specific sites.

Based on the analysis above, the correctly matched option is:

**Correct Option**: Restriction Endonuclease - Molecular Scissors.