Another term used for mobile genetic elements which may be used as a source of complementary RNA in RNA inter- ference technique is:

Options

A. phage DNA
B. transposon
C. jumping gene
D. both (2) and (3)

Answer

To solve the question regarding the term used for mobile genetic elements that can serve as a source of complementary RNA in RNA interference techniques, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Mobile Genetic Elements**:
- Mobile genetic elements are segments of DNA that can move around within the genome. They play a significant role in genetic variation and evolution.

2. **Identifying the Context of RNA Interference**:
- RNA interference (RNAi) is a biological process in which RNA molecules inhibit gene expression or translation, effectively silencing targeted genes. This process often involves double-stranded RNA (dsRNA).

3. **Exploring the Options Given**:
- The options provided are Fast DNA, Transposon, and Jumping Gene. We need to determine which of these terms is synonymous with mobile genetic elements that can provide complementary RNA for RNAi.

4. **Analyzing Each Option**:
- **Fast DNA**: This term does not relate to mobile genetic elements or RNA interference.
- **Transposon**: Transposons, also known as "jumping genes," are indeed mobile genetic elements that can replicate and move within the genome. They can produce RNA intermediates that may be used in RNA interference.
- **Jumping Gene**: This is another term for transposons, but it is not commonly used in scientific literature compared to "transposon."

5. **Conclusion**:
- The most accurate term used for mobile genetic elements that can be a source of complementary RNA in RNA interference is **Transposon**.

### Final Answer:
The answer to the question is **Transposon**.

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