Amount of DNA in intron part of a split gene is

Options

A. Very small
B. Equal to exon
C. Slightly more than exon part
D. Upto 10 times that of exon.

Answer

To determine the amount of DNA in the intron part of a split gene, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Gene Structure**:
- A split gene consists of exons and introns. Exons are the coding sequences that are expressed, while introns are the non-coding sequences that are typically spliced out during RNA processing.

2. **Defining Exons and Introns**:
- Exons are the segments of DNA that are transcribed into mRNA and translated into proteins.
- Introns, on the other hand, do not code for proteins and are removed from the pre-mRNA during splicing.

3. **Comparative Analysis**:
- In eukaryotic genes, the structure is often complex, with introns being more prevalent than exons.
- It is important to note that the amount of DNA in introns can vary significantly across different organisms.

4. **General Observation**:
- Research indicates that, on average, the amount of DNA present in introns is significantly larger than that in exons.

5. **Quantitative Comparison**:
- Studies suggest that introns can constitute up to 10 times more DNA than exons in the genes of higher eukaryotes.

6. **Conclusion**:
- Based on the information gathered, we conclude that the amount of DNA in the intron part of a split gene is "up to 10 times that of exon."

### Final Answer:
The amount of DNA in the intron part of a split gene is **up to 10 times that of exon**.

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