N biochemistry, metabolic pathways are series of chemical reactions occurring within a cell. In each pathway, a principal chemical is modified by a series of chemical reactions. Enzymes catalyze these reactions, and often require dietary minerals, vitamins, and other cofactors in order to function properly. Because of the many chemicals (a.k.a. "metabolites") that may be involved, metabolic pathways can be quite elaborate. In addition, numerous distinct pathways co-exist within a cell. This collection of pathways is called the metabolic network. Pathways are important to the maintenance of homeostasis within an organism. Catabolic (break-down) and Anabolic (synthesis) pathways often work interdependently to create new biomolecules as the final end-products.
<span>A metabolic pathway involves the step-by-step modification of an initial molecule to form another product. The resulting product can be used in one of three ways: </span>
<span>To be used immediately, </span>
<span>To initiate another metabolic pathway, called a flux generating step </span>
<span>To be stored by the cell </span>
<span>A molecule called a substrate enters a metabolic pathway depending on the needs of the cell and the availability of the substrate. An increase in concentration of anabolic and catabolic intermediates and/or end-products may influence the metabolic rate for that particular pathway. </span>
Frontal bone, lacrimal, maxilla, ethnoid, zygomatic and palatine contribute to the formation of the orbit.
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English King Henry VIII, who married six times, suffered from a rare blood disorder which was responsible for the miscarriages of wives and also made him “unstable” , a new research has claimed.Most British school children learn the following rhyme to help them remember the fate of each wife: “Divorced, Beheaded, Died: Divorced, Beheaded, Survived”.
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Genetic variation is essential for natural selection. It helps maintain the health of the population