Chapter%201%20MDM - – cell shape – transport paths –...

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Click to edit Master subtitle style 1 | Foundations of Biochemistry © 2009 W. H. Freeman and Company
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Cell: The Universal Building Block Living organisms are made of cells Simplest living organisms are singe-celled Larger organisms consists many cells with different functions Not all the cells are the same
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Bacterial, Plant, and Animal Cells are Different The internal structure and properties of cells from organisms in different kingdoms are rather different
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Cytoplasm and Cytoskeleton Cytoplasm is highly viscous solution where many reactions take place Cytoskeleton consists of microtubules, actin filaments, and intermediate filaments
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Unformatted text preview: – cell shape – transport paths – movement Biological Molecules Typically Have Several Functional Groups Genetic and Evolutionary Foundations • Life on Earth arose 3.5 – 3.8 billion years ago • Formation of self-replicating molecules a key step • Could it been DNA? • Could it been proteins? Miller-Urey Experiment RNA World? • RNA can acts both as the information carrier and biocatalyst Energy Coupling • Chemical coupling of exergonic and endergonic reactions allows otherwise unfavorable reactions • The “high-energy” molecule (ATP) reacts directly with the metabolite that needs “activation”...
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