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Water and Macromolecules Review (Nov 29-30)

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  • Name one function for this class of biomolecule.
    source of energy; cell structure
  • Proteins like hemoglobin require multiple subunits to interact; this is the ___ structure of proteins.
    quaternary
  • Which property of water gives it surface tension so that water bugs can walk on its surface?
    cohesion
  • Which class of biomolecules are generally hydrophobic?
    lipids
  • What does "high heat capacity" mean?
    a substance can absorb (or lose) large amount of thermal energy without changing temperature
  • What does "polar" mean?
    having charges unevenly distributed (a positive end and a negative end)
  • The complete three-dimensional structure of a polypeptide is the ___ structure of proteins.
    tertiary
  • To which class of biomolecule does this belong?
    protein
  • What type of fatty acid is this?
    unsaturated
  • Sweating cools you off thanks to this property of water.
    High heat of vaporization
  • What type of biomolecule is this?
    lipid (phospholipid)
  • What type of bonds connects atoms between different molecules of water?
    hydrogen
  • What type of bond connects atoms together in a single molecule of water?
    polar covalent
  • The temperature of lakes and oceans are relatively stable thanks to this property of water.
    high heat capacity
  • Which type of biomolecule is this?
    carbohydrate
  • The sequence of amino acids is the ___ structure of proteins.
    primary
  • Unsaturated fatty acids have ____ C-C bonds and pack together ____.
    double; loosely
  • Saturated fatty acids have ____ C-C bonds and pack together ____.
    single; tightly
  • When a protein unfolds, this is called ____.
    denaturation; denaturing
  • Why does water have negative and positive "poles"?
    O is more electronegative; pulls e- more; O is more negative so H is more positive
  • Name one function for this class of biomolecule.
    store of energy; insulation
  • What's a similarity between starch and glycogen?
    both polymers of glucose; both carbohydrates
  • What's the difference between starch and glycogen?
    starch in plants; glycogen in animals
  • Name one function for this class of biomolecule.
    store / transmit / communicate genetic information
  • Which two properties of water allow it to move up within the stem of a plant?
    adhesion and cohesion
  • What type of biomolecule is this?
    nucleic acid
  • The folding and coiling of a polypeptide chain is the ___ structure of proteins.
    secondary
  • What type of biomolecule is this?
    lipid (triglyceride)
  • What types of substances dissolve well in water?
    polar and ionic
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