Eukaryotic chromosomes:

Options

A. are circular and contain origin and terminator sequences
B. are linear and have origins and telomeres
C. contain coding and non-coding sequences
D. Both (b) and ( c )

Answer

**Step-by-Step Solution:**

1. **Understanding Chromosome Structure**: Eukaryotic chromosomes are distinct from prokaryotic chromosomes. Prokaryotic chromosomes are typically circular, while eukaryotic chromosomes are linear in structure.

2. **Identifying Key Features**: Eukaryotic chromosomes contain specific features such as:
- **Origins of Replication**: Sites where DNA replication begins.
- **Telomeres**: Protective caps at the ends of linear chromosomes that prevent degradation and maintain chromosome stability.

3. **Distinguishing Coding and Non-Coding Sequences**: Eukaryotic chromosomes contain both:
- **Coding Sequences (Exons)**: Parts of the gene that are expressed and translated into proteins.
- **Non-Coding Sequences (Introns)**: Segments of DNA that do not code for proteins but may have regulatory functions.

4. **Evaluating the Options**:
- **Option A**: Incorrect, as it describes prokaryotic chromosomes.
- **Option B**: Correct, as it states that eukaryotic chromosomes are linear and contain origins and telomeres.
- **Option C**: Correct, as it mentions the presence of both coding and non-coding sequences.
- **Option D**: Correct, as it combines both B and C.

5. **Conclusion**: The correct answer to the question regarding eukaryotic chromosomes is Option D, which states that eukaryotic chromosomes are linear and contain both coding and non-coding sequences.

**Final Answer**: Option D (Both B and C).

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