Nucleoprotein structres found at the end f chromosome are

Options

A. Centreomeres
B. Telomeres
C. Satellites
D. Centrosomes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks about the nucleoprotein structures located at the ends of chromosomes.

2. **Identifying the Options:**
The options given are:
- A) Centromeres
- B) Telomeres
- C) Satellites
- D) Centrosomes

3. **Analyzing Each Option:**
- **Centromeres:** These are located in the center of chromosomes and are crucial for the attachment of spindle fibers during cell division. Therefore, they cannot be the answer.
- **Telomeres:** These are indeed located at the ends of chromosomes. They consist of repetitive nucleotide sequences and play a vital role in protecting the chromosome ends from deterioration and fusion with neighboring chromosomes.
- **Satellites:** These refer to segments of DNA that contain repeating non-coding sequences. They do not specifically relate to the ends of chromosomes.
- **Centrosomes:** These are structures that help in the formation of spindle fibers and are not directly related to chromosome ends.

4. **Selecting the Correct Answer:**
Based on the analysis, the correct answer is **B) Telomeres**. They are essential for maintaining chromosome stability and regulating the length of chromosomes.

5. **Conclusion:**
The nucleoprotein structures found at the ends of chromosomes are called telomeres.