Lecture 2 Macromolecules

Lecture 2 Macromolecules - IPHY 3060 Lecture 2:...

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IPHY 3060 Lecture 2: Macromolecules
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Key points from last lecture: Cells are the smallest unit of life All living things are composed of cells
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Key points from last lecture: Cells are the smallest unit of life All living things are composed of cells What are cells made of?
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Macromolecules:
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Macromolecules: Large polymeric molecules that are the building blocks of cells and are necessary for cell function
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Examples of Macromolecules
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3 main types of macromolecules Lipids Proteins Nucleic Acids
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Lipids
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Composition of Lipids A charged group A glycerol phosphate linkage Long, non-polar tails
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Key Point: Lipids are amphipathic—they are both water loving (hydrophilic) and water hating (hydrophobic)
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3 main functions of lipids Formation of lipid bilayer membranes surrounding cell and organelles Storage of energy substrate Chemical signaling
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Formation of membranes Lipids arrange themselves spontaneously with polar heads pointing outward toward water and fatty acid tails pointing away from water
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Adipocytes—cells specialized for lipid storage Adipocytes store fats as triglycerides which can then be broken down into individual fatty acids and released when needed by other tissues
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Lipophilic hormones often formed from cholesterol
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This note was uploaded on 08/11/2010 for the course IPHY 3060 taught by Professor Allen,davi during the Fall '09 term at Colorado.

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Lecture 2 Macromolecules - IPHY 3060 Lecture 2:...

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