| 1. | Prokaryotic DNA organization |
| 2. | Eukaryotic chromatin structure |
| 3. | Mitochondrial genetic material |
| 4. | Ribosomal RNA complexes |
| 1. | Telomere protecting chromosome ends |
| 2. | Centromere joining sister chromatids |
| 3. | Kinetochore attaching spindle fibres |
| 4. | Nucleosome organising DNA structure |
| I: | The content of nucleolus is separated from the rest of the nucleoplasm as it is a membrane bound structure. |
| II: | Nucleolus is a site for active ribosomal RNA synthesis. |
| III: | Larger and more numerous nucleoli are present in cells actively carrying out protein synthesis. |