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 ...

A eukaryotic cell (left) has membrane-enclosed DNA, which forms a structure called the nucleus (located at center of the eukaryotic cell; note the purple DNA enclosed in the pink nucleus). A typical ...

A quick revision guide covering key concepts, biomolecules, cell organelles, and essential NEET-style MCQs to boost exam ...

Electron cryotomography (ECT) can reveal the structure of intact cells in a native state in 3D to macromolecular (∼4 nm) resolution. ECT bridges the resolution gap between atomic structures of ...

Prokaryotes, like eukaryotes, are organisms that store their genetic information in the form of deoxyribonucleic acid (DNA). However, prokaryotes differ from eukaryotes in that their genetic material ...

A new study challenges a popular scenario put forward to explain the arrival of the first eukaryotic organisms. In the beginning, there was boredom. Following the emergence of cellular life on earth, ...

Bacteria are amongst the simplest of organisms - they are made of single cells. Their cell structure is simpler than the cells of animals, plants and fungi. Size Most are 5 μm - 100 μm. Most are 0.2 ...