Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique ...

Every living organism falls into one of two groups: eukaryotes or prokaryotes, with cellular structure determining which group an organism belongs to. Prokaryotes are unicellular and lack a nucleus ...

While prokaryotic cells do not have membrane-bound structures, they do have distinct cellular regions (Figure 1). In prokaryotic cells, DNA bundles together in a region called the nucleoid. Primitive ...

Prokaryotes are the group of organisms including bacteria and archaea that do not have a membrane-bound nucleus and instead have a circular, double-stranded molecule of DNA called a nucleoid, that is ...

Why have bacteria never evolved complex multicellularity? A new hypothesis suggests that it could come down to how prokaryotic genomes respond to a small population size. Every organism visible to the ...

DNA methylation refers to the process of adding a methyl group to specific regions of DNA. This process can bring about changes in the activity of DNA without changing the sequence of nucleotides.

Last month, many microbiologists were surprised to find that the familiar names and nomenclature for the bacteria and archaea they study had been rewritten, seemingly overnight. On December 10, the ...

Modern eukaryotic cells have proteins that enable chromosome segregation during cell division, new discoveries shed light on their origin in simpler prokaryotic organisms. Modern nucleated (eukaryotic ...

Researchers have revealed new details about the CRISPR-Cas5-HNH/Cascade complex, a variant of the type I-E CRISPR-Cas system, providing insights into its DNA recognition and cleavage mechanisms. The ...