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molecular biology
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Bacteria Sacrifice DNA Repair for Better RNA
Preserving its DNA ought to be a cell’s top priority. But bacteria slow their DNA repair to a crawl in favor of proofreading gene transcripts.
Simple Bacteria Offer Clues to the Origins of Photosynthesis
Studies of the energy-harvesting proteins in primitive cells suggest that key features of photosynthesis might have evolved a billion years earlier than scientists thought.
Beating the Odds for Lucky Mutations
If DNA repair makes useful mutations more likely, it could accelerate cells’ adaptations to harsh environments.
Shrinking Bat DNA and Elastic Genomes
Species gain and shed startling amounts of DNA as they evolve, and even genomes that look stable churn furiously. What does it mean?
The Illuminating Geometry of Viruses
Mathematical insights into how RNA helps viruses pull together their protein shells could guide future studies of viral behavior and function.
Missing Mutations Suggest a Reason for Sex
Sex might help natural selection purge excessive mistakes from our genes.
Cell Atlases Reveal Biology’s Frontiers
New techniques expose unexpected diversity within seemingly uniform tissues.
How Heat Kills Cells
The proteins that unravel as the temperature starts to rise turn out to be among the most vital.
How Viruses May Have Led to Complex Life
Without viruses, we might never have evolved.