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Nutrients are chemical substances in food that provide energy, form
Nutrients are chemical substances in food that provide energy, form

... Some enzymes consist only of proteins. Most enzymes, however, contain a protein called an apoenzyme that is inactive without a nonprotein component called the cofactor. Together the apoenzyme and cofactor are an activated holoenzyme, or whole enzyme. If the cofactor is removed, the apoenzyme will no ...
(18 pts) Pyruvate can be converted to a variety of othe
(18 pts) Pyruvate can be converted to a variety of othe

... significant effect on its metabolism. Take two of the molecules you named in part a and describe how the cell’s “choice” of which one of them is made depends either on the environment in which the cell lives or on which organism it is. Ethanol vs Lactate—is it a yeast cell or a bacterial cell or a m ...
Name: Date: Per: ______ Cell Energy Standard: 1. f. Students know
Name: Date: Per: ______ Cell Energy Standard: 1. f. Students know

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amino acid - proffittscience

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Macromolecules PPT.

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The Mechanics of Life

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Quale Vita? - uniroma1.it

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Chemistry in Living Things - Mercer Island School District

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Macromolecule Expert Sheets

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Chapter 9 - web.biosci.utexas.edu

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Chapter 3 LEAP Biology practice Test

... Answers: Organic Compounds: Carbon based molecules Isomers: Compounds with same formula but different structural arrangements Hydrocarbons: Methane and other compounds composed of only Carbon and Hydrogen An organic compound’s unique properties depend on what? (2 answers) Size and shape of molecule ...
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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

... The α and β cyclic forms of D glucose are referred to as__________ The charged amino acid, which is electrically neutral, is called _________. _________ is the specific region on the enzyme at which substrate binds. _________ is the ring system present in cholesterol. Nitrogenous bases are conjugate ...
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Life Substances

PowerPoint Presentation - Nerve activates contraction
PowerPoint Presentation - Nerve activates contraction

... – Chemical energy used by all cells – Energy is released by breaking high energy ...
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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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