4.1 : Energy & Enzymes

• Polar Bonds

  • Unequal and have lower chemical potential energy
• NonPolar Bonds

  • Equal and have higher chemical potential energy
• What is energy?

  To do work or promote change
• What is Gibbs Free Energy?

  The change in energy to product
• What is an exergonic reaction?

  • It goes from High to low and have lower free energy
• What is an endergonic reaction?

  • It goes from low to high and have a higher free energy
• Which reaction is spontaneous?

  exergonic
• which reaction is not spontaneous?

  endergonic
• which reaction is energetically unfavorable?

  exergonic
• which reaction is energetically favorable?

  endergonic
• What is catabolic, what reaction does it belong to?


  Breaksdown, exergonic
• what is anabolic, what reaction does it belong to?

  Builds/adds, endergonic
• What is a competitive inhibitor?


  A molecule that binds to the active site of an enzyme and blocks substrate from binding
• what is an allosteric regulation?

  A molecule that binds to the enzyme and changes its shape preventing the substrate from fitting in the active site.
• What is ATP Hydrolysis?

  the enzymatic process of breaking down adenosine triphosphate (ATP) into adenosine diphosphate (ADP) - energy released used to fuel?
• What does ATP stand for?

  Adenosine Tri Phosphate
• what is a redox reaction?

  One is losing and one is gaining
• What does redox stand for?

  reduction & oxidation
• What does reduction do?


  Gaining electrons
• What does oxidation do?


  Losing electrons
• what type of reaction is this? 2H2 + O2 ----> 2H2O

  Endergonic
• what is does ΔG tell you?

  the difference in energy between the reactants and products
• what is phosphorylation?


  Addition of a phosphate group to a molecule.
• where do substrates bind to an enzyme?

  active site
• where do non competivie inhibitos bind on an enzyme?

  Allosteric site
• What would happen to an enzyme catalyzed reaction if you add more competitive inhibitors?

  The reaction would slow, and possibly cease
• Which pathway (anabolic or catabolic) would use energy?

  anabolic
• what happens in a reduction reaction?


  an element / molecule is gaining electrons