Today's Featured Artist: Michael Godard
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Cell Nucleus, Sem
Photograph - Photograph
Cell nucleus, coloured scanning electron micrograph (SEM). Part of the nuclear wall (orange) has been removed to reveal the organelle's contents, which includes the cell's genetic information in the form of DNA (deoxyribonucleic acid), RNAs (ribonucleic acids) and nuclear proteins. The nuclear pore complexes (tiny circles) in the nuclear envelope can also be seen. All material moving between the nucleus and the cytoplasm passes through these channels. They allow passive transport (diffusion) of ions and small molecules and active transport (energy dependent) of proteins and RNAs (ribonucleic acids).
May 2nd, 2013
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