The eukaryotic genome differs from the prokaryotic genome because `:`

Options

A. DNA is complexed with histones in prokaryotes
B. repetitive sequences are present in eukaryotes
C. genes in the former cases are organised into operons
D. DNA is circular and single stranded in prokaryotes

Explanation

To answer the question regarding how the eukaryotic genome differs from the prokaryotic genome, we can break down the differences step by step:

### Step-by-Step Solution:

1. **Definition of Genome**:
- The genome refers to the complete set of genetic material (DNA) present in an organism, including all of its genes.

2. **Structure of Genetic Material**:
- In prokaryotes (like bacteria), the genetic material is typically **circular** and **single-stranded**. This means that the DNA forms a closed loop and does not have the complex structure found in eukaryotes.
- In contrast, eukaryotic organisms (like plants, animals, and fungi) have their genetic material organized into **linear** and **double-stranded** chromosomes. This structure is more complex and allows for greater regulation of gene expression.

3. **Association with Proteins**:
- Eukaryotic DNA is associated with **histone proteins**, which help in packaging the DNA into a compact structure called chromatin. This is crucial for the organization and regulation of genes.
- In prokaryotes, the DNA is not associated with histones in the same way, although there are some proteins that help in organizing the DNA.

4. **Gene Organization**:
- In prokaryotes, genes are often organized into **operons**, which are clusters of genes transcribed together under the control of a single promoter. This allows for coordinated expression of related genes.
- Eukaryotic genes are typically organized individually and are regulated independently, although they can also be part of larger regulatory networks.

5. **Presence of Repetitive Sequences**:
- Eukaryotic genomes often contain a significant amount of **repetitive DNA sequences**, which can play roles in gene regulation and chromosome structure.
- Prokaryotic genomes tend to have less repetitive DNA.

### Conclusion:
The eukaryotic genome differs from the prokaryotic genome primarily in that the DNA in prokaryotes is circular and single-stranded, while eukaryotic DNA is linear and double-stranded, associated with histones, and organized differently.

### Final Answer:
The eukaryotic genome differs from the prokaryotic genome because **DNA is circular and single-stranded in prokaryotes**.

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