Energy metabolism

Jun 28th, 2015
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University of California - Davis
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Where do cells obtain their energy?Cells seek their energy in the form of food molecules or sunlight. The sun is the ultimate source of energy for all cells because photosynthetic prokaryotes, algae, and plant cells harness solar energy and use it to make organic food molecules for growth and metabolism. The nutrients of the cells are in the form of fats and sugars. These molecules must pass across the cell membrane that functions as barrier. (5) How do cells turn nutrients into usable energy? Cells release the energy stored in their food molecules through a series of oxidation reactions.

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