A eukaryote is any cell or organism that possesses a clearly defined nucleus. Eukaryotic cells form the foundation of complex, multicellular life, including apple trees, mushrooms, fish and humans.

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 ...

They derive their energy from differences in the concentration of hydrogen ions across some of these membranes ...

Hormone levels fluctuate like the tides, ebbing and flowing according to carefully orchestrated cycles. These hormones not only influence the body, but can cross into the brain and shape the behavior ...

3D electron tomography reveals glycogen particles (purple) clustered on the surface of lipid droplets (yellow), closely associated with endoplasmic reticulum membranes (blue) and mitochondria (red), ...

Red blood cells transport oxygen throughout your body, including to vital organs and tissues. They also help your body get rid of carbon dioxide. Too little or too many red blood cells may be ...

Researchers have identified how to encourage tumors to build their own immune hubs—structures that look and function like ...