Cell nucleus. Coloured Transmission Electron Micrograph (TEM) of a slice through a liver cell,showing a large round nucleus and cell organelles. The nucleus is bounded by a double membrane con- taining pores that allow large molecules to pass out. The dark material inside the nucleus is chro- matin,a condensed form of DNA. Within this is a lighter area,the nucleolus,which contains unrav- elled DNA involved in making ribosomes (protein- manufacturing bodies). Outside the nucleus are mitochondria (round bodies,right),which provide the cell with chemical energy,and the endoplasmic reticulum (folded structure,top left),where proteins are made. Magnification unknown | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Biology Media |
Taille de l’image : | 5223 px × 3492 px |
Model Release : | Non requis |
Property Release : | Non requis |
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