Coloured SEM of a cell nucleus

Coloured SEM of a cell nucleus

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Caption: 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.

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Keywords: biological, biology, cell, cell structure, cytology, cytoplasm, freeze fracture sem, freeze-fracture, microbiology, nuclear, nuclear membr, nuclear pore, nucleus, pore, typical

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