Visualizing Genes: The Possible Dream
– Science News, September 2, 1972
Molecular biologists can now visualize the larger structures of the cell, such as the nucleus and chromosomes, under the powerful electron microscope. But they have not been able to obtain images of genes (DNA) on the chromosomes. Nor have they been able to see RNA … or the intricate details of cell membranes, enzymes and viruses.
Update
Electron microscopes have become much more powerful over the last 50 years. For instance, in 1981, biophysicist Jacques Dubochet discovered that tiny biological structures supercooled with ethane could be observed in their natural state under an electron microscope. That finding paved the
→ Continue reading at Science News