| CYTOPLASM | Contents of a cell, excluding the nucleus (9) |
| NUCLEOLUS | Largest structure within the nucleus of most eukaryotic cells, associated with RNA synthesis and the formation of ribosomes (9) |
| POUNDSIGN | Key on the bottom of a cell |
| ORGANELLE | Leon, at large, turned out to be part of a cell (9) |
| RULINGOUT | Excluding, ... the possibility (6,3) |
| EXCHEQUER | English Times contacts church over the nucleus of question briefly relating to state funds (9) |
| ELECTRONS | Particles outside the nucleus |
| CYTOSOL | The soluble component of the protoplasm of a cell surrounding the nucleus (7) |
| ENERGID | The nucleus of a cell together with the mass of protoplasm around it (7) |
| CHROMOSOME | A thread-like structure found inside the nucleus of a cell (10) |
| NUCLEAR | Relating to the nucleus of a cell (7) |
| NAVE | The main part of a church, excluding the transept and chancel (4) |
| COMA | Nebulous envelope surrounding the nucleus of a comet; or, a group of bracts crowning a pineapple (4) |
| AMITOSIS | The direct method of cell division characterized by simple division of the nucleus without formation of chromosomes. |
| DISC | Part of the spine that consists of a tough outer layer, the annulus, and softer centre called the nucleus (4) |
| RANKANDFILE | The ordinary soldiers of an army, excluding the officers (4,3,4) |
| CORE | Nucleus and inner electrons of an atom, excluding the valency electrons (4) |
| LYSIS | The breaking down of the membrane of a cell, often by viral, enzymic or osmotic mechanisms (5) |
| MUTATE | To undergo a change as in the genes of a cell |
| ATOMIC | ___ number is equal to the number of protons present in the nucleus of the atom (6) |
