polyprotein (Science: protein) protein that, after synthesis, is cleaved to produce several functionally distinct polypeptides. Some viruses produce such proteins and some polypeptide hormones seem to be cleaved from a single precursor polyprotein (pro opimelanocortin, for example)...
Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..
The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..
The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..
This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..
This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..
