Respiration160-page1 - Cell Respiration - 1 All cells must...

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Cell Respiration - 1 All cells must do work to stay alive and maintain their cellular environment. The energy needed for cell work comes from the bonds of ATP. Cells obtain their ATP by oxidizing organic molecules, a process called cellular respiration. Although many organic molecules can be oxidized, glucose, a main product of photosynthesis, is the primary fuel molecule for the cells of living organisms. Every living organism, autotroph and heterotroph, must do cell respiration. In fact, the metabolic pathways used in the process of cellular respiration are the same in virtually all eukaryotic organisms as well as most prokaryotic organisms. Recall that organisms that do photosynthesis (or properly, manufacture their own fuel molecules) are called autotrophs. Heterotrophs obtain their fuel molecules "pre-formed" by other organisms. Animals, fungi and many protists are heterotrophs, as are most bacteria. Plants and some protists are autotrophs, as are some bacteria.
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This note was uploaded on 12/29/2011 for the course BIO 151 taught by Professor Edwards during the Spring '10 term at SUNY Stony Brook.

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