Cysteine
(Science: amino acid) The only amino acid to contain a thiol (SH) group. In intracellular enzymes the unique reactivity of this group is frequently exploited at the catalytic site. In extracellular proteins found only as – cystine in disulphide bridges or fatty acylated.
The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..
Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..
This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..
Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..
The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..
Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..
