It gets organised into chromosomes.
Explanation
In the nucleus of a eukaryotic cell that is not dividing (during interphase), genetic material exists as a loose, entangled mass of thread-like structures known as chromatin. Chromatin is composed of DNA wrapped around histone proteins. The structural state of this material changes drastically when the cell enters the division phase.
Detailed Analysis:
- It dissolves into the cytoplasm. is Incorrect: Chromatin does not dissolve into the cytoplasm. While the nuclear envelope breaks down during prophase, the chromatin itself condenses into a more solid form rather than dissolving.
- It gets organised into chromosomes. is Correct: As the cell prepares to divide (specifically during the Prophase stage of mitosis or meiosis), the chromatin fibers condense, coil, and thicken. This process organizes the genetic material into distinct, rod-shaped structures called chromosomes. This condensation is essential to prevent the tangling of DNA strands and ensures the accurate segregation of genetic material to daughter cells.
- It exits the nucleus through pores. is Incorrect: Chromatin does not exit the nucleus through nuclear pores. Instead, the nuclear envelope disintegrates, allowing the spindle fibers to interact with the fully formed chromosomes within the cell's cytoplasm.
- It converts into RNA. is Incorrect: Chromatin does not convert into RNA. Chromatin is the structural form of DNA. While DNA serves as a template for RNA synthesis (transcription), the material itself remains DNA and protein.
Key Takeaway:
The transformation of loose, thread-like chromatin into compact, organized chromosomes is a fundamental event marking the onset of cell division, facilitating the precise distribution of genetic material.