Satellite of chromosome is

Options

A. rich in RNA and deficient in DNA
B. rich in DNA and deficient in RNA
C. rich in protein
D. devoid of DNA

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Satellite of Chromosome":**
- The term "satellite" refers to a specific region of a chromosome that is distinct from the main body of the chromosome. It is often located at the end of a chromosome and can be separated from the rest of the chromosome.

2. **Characteristics of the Satellite:**
- Satellites are known to be involved in the structure of chromosomes. They are typically associated with the secondary constriction of chromosomes, which allows them to be visually distinct during certain stages of cell division.

3. **Composition of the Satellite:**
- The satellite region is primarily composed of DNA. It is important to note that while it contains DNA, it is deficient in RNA. This means that the satellite region does not have the same amount of RNA as other parts of the chromosome.

4. **Analyzing the Options:**
- Option A: "Reaches in the DNA and is deficient in the DNA" - Incorrect, as it suggests a deficiency in DNA.
- Option B: "Reaches in the DNA and is deficient in RNA" - Correct, as it accurately describes the composition of the satellite.
- Option C: "Reaches in the protein" - Incorrect, as satellites are not primarily composed of proteins.
- Option D: "Divides in the DNA" - Incorrect, as this does not accurately describe the function or composition of the satellite.

5. **Conclusion:**
- Based on the understanding of the satellite of chromosomes, the correct answer is Option B: "Reaches in DNA and is deficient in RNA."