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Catalysis by Enzymes
Catalysis by Enzymes

... Catalysis by Enzymes •  Enzyme A protein that acts as a catalyst for a biochemical reaction. ...
Electron transport chain
Electron transport chain

... • Only 4 of 38 ATP ultimately produced by respiration of glucose are derived from substrate-level phosphorylation (2 from glycolysis and 2 from Krebs Cycle). • The vast majority of the ATP (90%) comes from the energy in the electrons carried by NADH and FADH2. • The energy in these electrons is used ...
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... 12. Explain   nitrogen   equilibrium.   Why   would   health   professionals   look   at   nitrogen  balance  of  patients?   13. What   is   the   RDA   of   protein   in   our   diet?   How   does   this   RDA   change   if   the   patient ...
Chapter 8
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... For example, the "nerve gas" Sarin reacts specifically with an active site Ser residue on the enzyme, acetylcholinesterase. If acetlycholine cannot be hydrolyzed by this enzyme, nerve signals cannot be passed across the synapses of the nervous system. On exposure to this compound, death can result i ...
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L14_Adv06PDHwebCT

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... by statistics—no means or standard deviations. The results of individual experiments are repeated once or twice and some of the experiments have, apparently, only been carried out once. Although one may wonder how a modern reviewer would deal with such a manuscript, the more important point is the n ...
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L-VIAVA TRADE NAME L-VIAVA INTERNATIONAL

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Ch10p3

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NOTE: The provided figures may be useful and beneficial. Use them
NOTE: The provided figures may be useful and beneficial. Use them

... NOTE: The provided figures may be useful and beneficial. Use them at your discretion. Keep up the good work & be an Intentional Learner. Learning Log Chapter 5 1. Compare & contrast the 4 main classes of macromolecules. Include a labeled drawing of their monomers, 3 examples of each polymer & the po ...
Jeopardy - Alfred State College intranet site
Jeopardy - Alfred State College intranet site

... The glycolysis reaction in which 2phosphoglycerate is converted into phosphoenolpyruvate is this type of chemical reaction. ...
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Translation Notes

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Metabolism



Metabolism (from Greek: μεταβολή metabolē, ""change"") is the set of life-sustaining chemical transformations within the cells of living organisms. These enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments. The word metabolism can also refer to all chemical reactions that occur in living organisms, including digestion and the transport of substances into and between different cells, in which case the set of reactions within the cells is called intermediary metabolism or intermediate metabolism.Metabolism is usually divided into two categories: catabolism, the breaking down of organic matter by way of cellular respiration, and anabolism, the building up of components of cells such as proteins and nucleic acids. Usually, breaking down releases energy and building up consumes energy.The chemical reactions of metabolism are organized into metabolic pathways, in which one chemical is transformed through a series of steps into another chemical, by a sequence of enzymes. Enzymes are crucial to metabolism because they allow organisms to drive desirable reactions that require energy that will not occur by themselves, by coupling them to spontaneous reactions that release energy. Enzymes act as catalysts that allow the reactions to proceed more rapidly. Enzymes also allow the regulation of metabolic pathways in response to changes in the cell's environment or to signals from other cells.The metabolic system of a particular organism determines which substances it will find nutritious and which poisonous. For example, some prokaryotes use hydrogen sulfide as a nutrient, yet this gas is poisonous to animals. The speed of metabolism, the metabolic rate, influences how much food an organism will require, and also affects how it is able to obtain that food.A striking feature of metabolism is the similarity of the basic metabolic pathways and components between even vastly different species. For example, the set of carboxylic acids that are best known as the intermediates in the citric acid cycle are present in all known organisms, being found in species as diverse as the unicellular bacterium Escherichia coli and huge multicellular organisms like elephants. These striking similarities in metabolic pathways are likely due to their early appearance in evolutionary history, and their retention because of their efficacy.
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