Which of the following is a wrong statement

Options

A. RE's recognize and cut DNA at specific locations
B. Plasmids are linear dsDNA
C. molecules
D. Hybrid DNA formed by both plasmid DNA and desired DNA fragment is called r DNA

Answer

To determine which statement is incorrect among the provided options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Examine Option A**:
- Statement: "RE, restriction enzyme recognize and cut the DNA at a specific location."
- Analysis: This statement is true. Restriction enzymes (RE) are proteins that can recognize specific sequences in DNA and cut it at those sites.

2. **Examine Option B**:
- Statement: "Plasmids are linear double stranded DNA."
- Analysis: This statement is misleading. Plasmids are typically circular double-stranded DNA molecules, not linear. Therefore, this statement is incorrect.

3. **Examine Option C**:
- Statement: "All the molecules."
- Analysis: This statement is vague and lacks context. It does not provide any clear information about what is being referred to, making it an incomplete statement.

4. **Examine Option D**:
- Statement: "A hybrid DNA formed by both the plasmid DNA and a desired DNA fragment is called rDNA."
- Analysis: This statement is true. Recombinant DNA (rDNA) is indeed formed by combining plasmid DNA with a desired DNA fragment.

### Conclusion:
After analyzing all the options, we find that:
- Option A is correct.
- Option B is incorrect (as plasmids are typically circular).
- Option C is vague and incomplete.
- Option D is correct.

Thus, the statement that is wrong is **Option B**.

### Final Answer:
The wrong statement is **Option B: "Plasmids are linear double stranded DNA."**

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