DNA element with ability to change positions is called

Options

A. Cistron
B. Transposon
C. Intron
D. Recon

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a DNA element that has the ability to change its position within the genome.

2. **Analyzing the Options**:
- **Option 1: Cistron**: A cistron is a functional unit of a gene, which includes the sequence that codes for polypeptides, tRNA, mRNA, and rRNA. However, cistrons do not have the ability to change their position, so this option is incorrect.

- **Option 2: Transposon**: Transposons, also known as "jumping genes," are DNA sequences that can move or "jump" from one location in the genome to another. This ability to change positions makes transposons the correct answer.

- **Option 3: Intron**: Introns are segments of DNA that do not code for proteins and are typically removed during RNA processing. They do not have the ability to change positions, making this option incorrect.

- **Option 4: Recon**: Recon refers to the smallest unit of a gene that is useful for transcription and translation. Like cistrons and introns, recons do not have the ability to change positions, so this option is also incorrect.

3. **Conclusion**: After analyzing all the options, the only DNA element that can change its position is the transposon. Therefore, the correct answer is **Option 2: Transposon**.

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