The percentage of extragenic DNA in human genome is about

Options

A. `20%`
B. `80%`
C. `70%`
D. `30%`

Answer

To determine the percentage of extragenic DNA in the human genome, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Human Genome**: This refers to the complete set of genetic instructions found in a human being.
- **Extragenic DNA**: This is the DNA that exists between genes, which does not code for proteins. It includes non-coding regions.

2. **Analyze the Options**:
- The options provided are 20%, 80%, 70%, and 30%. We need to identify which of these percentages accurately represents the extragenic DNA in the human genome.

3. **Research the Composition of the Human Genome**:
- The human genome is composed of approximately 3 billion base pairs. A significant portion of this DNA is non-coding, which includes extragenic DNA.

4. **Determine the Percentage of Extragenic DNA**:
- Studies and genomic analyses indicate that about 70% of the human genome is made up of extragenic DNA. This includes introns, regulatory sequences, and other non-coding regions.

5. **Select the Correct Option**:
- Based on the information gathered, the correct answer is that the percentage of extragenic DNA in the human genome is about **70%**.

### Final Answer:
The percentage of extragenic DNA in the human genome is about **70%**.

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