Lipids

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22/03/2021
María Ximena Morales Aguiluz
Mind Map by María Ximena Morales Aguiluz, updated more than 1 year ago
María Ximena Morales Aguiluz
Created by María Ximena Morales Aguiluz almost 5 years ago
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Resource summary

Lipids
  1. Are a diverse group of molecules that contains regions composed almost entirely of hydrogen and carbon, with nonpolar carbon-carbon and carbon-hydrogen bonds.
    1. Most lipids are hydrophobic and water insoluble.
    2. Fatty acid
      1. Are long chains of carbon and hydrogen with a carboxylic acid group at one end.
        1. Oils, fats and waxes, esch contains one or more fatty acids subunits.
      2. Oils and fats
        1. Are formed by dehydration synthesis linking three fatty acid subunits to one molecule of glycerol. This structure is named triglycerides.
          1. Are used primarily as energy-storage molecules, they contain more than twice as many calories per gram as do carbohydrates and proteins.
            1. The difference between a fat and an oil, lies in the structure of their fatty acids subunits.
              1. In fats, the carbons of fatty acids are joined by single bonds. These described as saturated, because they contain as many hydrogen atoms as possible.
                1. If there are double bonds betwen some of the carbons, and consequently fewer hydrogens, the fatty acid is unsaturated.
              2. Waxes
                1. Are chemically similar to fats. Are highly saturated and solid at normal temperatures.
                2. Phospholipids
                  1. The plasma membrane that surrounds each cell cointains severak types of phospholipids.
                    1. Has two dissimilar ends. At one end, are two nonpolar fatty acid "tails"(insoluble in water). And the other, is a polar phosphate-nitrogen "head" (soluble in water.
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