In human genome, the intergenic regions contain

Options

A. Gene related sequences
B. Intragenic DNA
C. Extragenic DNA
D. 1 & 3 are correct

Answer

To solve the question regarding what the intergenic regions contain in the human genome, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Intergenic Regions**:
- Intergenic regions are the segments of DNA located between genes. They do not code for proteins but can have important regulatory functions.

2. **Analyze the Options**:
- **Option 1: Gene related sequence**: This refers to sequences that may be involved in the regulation of gene expression. This is a plausible component of intergenic regions.
- **Option 2: Intragenic DNA**: This refers to DNA sequences located within a gene. Since intergenic regions are between genes, this option is incorrect.
- **Option 3: Extragenic DNA**: This refers to DNA sequences that are outside of genes, which aligns with the definition of intergenic regions. This option is also plausible.
- **Option 4: 1 and 3 are correct**: This option suggests that both gene-related sequences and extragenic DNA are found in intergenic regions.

3. **Determine the Correct Answer**:
- Since intergenic regions can contain gene-related sequences (which can act as enhancers) and extragenic DNA (which is essentially what intergenic regions are), both options 1 and 3 are correct.
- Therefore, the correct answer is **Option 4: 1 and 3 are correct**.

### Final Answer:
The intergenic regions in the human genome contain gene-related sequences and extragenic DNA. Thus, the correct answer is option 4: 1 and 3 are correct.

---