Cell nucleus. Coloured scanning electron micrograph (SEM) of a freeze fractured cell nucleus (red) and cytoplasm (green). The nucleus is bounded by a nuclear membrane containing gaps (nuclear pores,pink) that allow large molecules to pass out of the nucleus. The nucleus of a cell contains a complete set of the organism's genes,which are encoded into DNA molecules on chromosomes. Freeze fracturing involves rapidly freezing the cell before fracturing it with a sharp edge. It provides a facing view of membranes,rather than the cross-sectional view provided by normal techniques. Magnification unknown | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Fawcett, Don W. |
Bildgröße: | 3470 px × 5138 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
|