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Worksheet Answer Key
Worksheet Answer Key

... Multiple sugars connected is called a polysaccharide. List the 4 main types of polysaccharides and their functions: starch (energy storage in plant cells) glycogen (energy storage in animal cells) cellulose (major component in cell walls) chitin (major component in fungus cell walls and exoskeletons ...
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K,Mg,Ca,Na… 0,4%

... in large quantities (C, N, H, O, S, P, K, Ca, Mg, Fe); others as microelements or trace elements (Mn, Zn, Co, Mo, Cu…..) – part of enzymes and cofactors  Nutrients are used in biosynthesis and as a source of energy (chemotrophs)  CARBON – the skeleton of organic substances (often together as sourc ...
Lecture 2 - Chem Review
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CHE 4310 Fall 2011
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AP Biology Discussion Notes

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4 Classes of Large Biological Molecules Carbohydrates Lipids

... Has two fatty acids attached to a glycerol molecule The 3rd –OH group is attached to a phosphate group (- charge) Show ambivalent properties toward water Steroids Have C skeletons consisting of 4 rings, only variation come in functional groups Cholesterol: precursor from which many other steroids ar ...
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Chapter 3: The Chemistry of Organic Molecules

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Chapter 6 Vocab Word Bank

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Study Outline

... 22. The final electron acceptors in anaerobic respiration include NO3−, SO42−, and CO32−. 23. The total ATP yield is less than in aerobic respiration because only part of the Krebs cycle operates under anaerobic conditions. Fermentation (pp. 130–133) 24. Fermentation releases energy from sugars or ot ...
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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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