Energy and Life

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  • Created by: Ferin
  • Created on: 10-02-13 15:43
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  • Energy & Life
    • Chemical Energy and ATP
      • One of the most important compounds that cells use to store and release energy is called adenosine triphosphate (ATP).
        • It is a nucleoside triphosphate used in cells as a coenzyme. It is often called the "molecular unit of currency" of intracellular energy transfer. It transports chemical energy withing cells for metabolism.
      • Cells can  release the energy stored in ATP by the controlled breaking of the chemical bonds between the second and third phosphate groups.
      • Cells carry out active transport using ATP. Energy from ATP is needed for many cellular activities including active transport across cell membranes, protein synthesis, and muscle contraction.
    • Methods of Getting Food
      • An autotroph is an organisim  that can produce its own food using water, light, carbon dioxide or other chemicals.
        • Algae and phytoplankton are autotrophs.
        • The process by which autotrophs use the energy of sunlight to produce high-energy carbohydrates(sugars and starches) that can be used as food is called photosynthesis
      • Organisms that obtain food by consuming other living things are known as heterotrophs. Some consume plants while some consume other heterotrophs.
        • Animals like humans are heterotrophs. Some plants like the venus fly trap are also heterotrophs.
  • The process by which autotrophs use the energy of sunlight to produce high-energy carbohydrates(sugars and starches) that can be used as food is called photosynthesis

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