exam 4 chem

  1. What is a chain of carbon called?
    polymer backbone
  2. What is an addition polymer?
    a polymer created when monomers add on to one another breaking the double bond and the polymer still contains all the atoms of the monomers
  3. What is the difference between low density polyethylene and high-density polyethylene?
    • HDPE holds its shape better in boiling water
    • HDPE has fewer side chains branching off
    • HDPE has a higher density than LDPE
    • HDPE is less flexible than LDPE
    • HDPE packs closer together
    • HDPE are stronger
  4. What does monomer refer to?
    one unit
  5. What is vulcanization?
    when sulfur forms cross-links between polymer chains
  6. What is the main use of elastomers?
  7. How are Nylons named?
    according to the number of carbons atoms in each monomer units
  8. What is a condensation polymer?
    a polymer created when monomers react and form the byproduct of water and that polymer only has some of the atoms of the monomer
  9. What are crystalline polymers?
    when molecules line up neatly to form long fibers of great strength
  10. ____ polymers are often elastomers.
  11. What is an elastomer?
    a material that returns to its original after being stretched
  12. What are the 4 essential biomolecules?
    • Proteins
    • Fats
    • Carbohydrates
    • Nucleic Acids
  13. What is an anabolic reaction?
    two or more small molecules synthesize a larger molecule by adding energy
  14. What is a catabolic reaction?
    When a large molecule degrades to form smaller molecules thus releasing energy
  15. Why do we need catabolism?
    To break down fats, carbs, and proteins we eat into monomers that we can use and energy can be used for the body
  16. What two monosaccharides are combined to create sucrose?
    glucose and fructose
  17. What is the structural difference between starch and cellulose?
    the way the monomers of glucose connect to each other
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exam 4 chem