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Chemicals of Life p. 74
Chemicals of Life p. 74

... Structure: ...
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Introduction to metabolism. Specific and general pathways of

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Carbohydrates, Lipids, Nucleic Acids, and Proteins are

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Biomolecules Fill in the crossword puzzle by using

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... During catabolism (breakdown rxns of metabolism), energy is released in the form of ATP. Often energy is also released in the form of electrons (i.e. the organic molecule being broken down is oxidized). These electrons are carried by electron carriers such as NADH and FADH2 (Note: when not carrying ...
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Metabolism Metabolism refers to all the chemical reactions within an

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BIO 6.3 Carbon - Steinbach Science

... (e.g.,  starch,  glycogen,  cellulose)   Lipids  are  organic  compounds  that  have  a  large   portion  (much  greater  than  2  to  1)  or  C—H   bonds  and  less  oxygen  than  carbohydrates  (e.g.,   beef  fat  has  the  formula ...
Recitation 3 - Department of Chemistry ::: CALTECH
Recitation 3 - Department of Chemistry ::: CALTECH

... are bounced off and things that are bounced off are these high energy carriers. High energy carriers bounce down a staircase A series of oxidation reactions then ensue with the result that two carbons are expelled as CO2, (G/A)TP is produced and the electron carriers (NAD+ and FAD+) are reduced. ...
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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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