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.
A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..
Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..
Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..
Plants and animals need elements, such as nitrogen, phosphorus, potassium, and magnesium for proper growth and developme..
Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..