Summary of Cellular Respiration

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  1. Flow
    • a.     
    • Glucoseà
    • NADH (or FADH2)à ETCà proton-motive
    • forceà
    • ATP
  2. Output
    • i.     
    • Glycolysis: 2 ATP

    • ii.     
    • CAC: 2 ATP
  3. Output for oxiddative phosphorylation
    1.      Each NADH contributes about three, but we cannot state an exact number
  4. Why can't we state the exact number?
    • a.      Phosphorylation and the redox reactions are not directly coupled to each other, so the ratio of the number of NADH to the number of ATP is not whole
    •                                                                                                                                       i.      1 NADH results in 10 H+ being transported, but the exact number that must reenter the matrix via ATP synthase to generate one ATP is uncertain
    • 1.      May be 2.5
    •                                                                                                                                     ii.      Also, FADH2, due to entering the ETC later produces 1.5 ATP molecules
    • b.      ATP yield varies slightly depending on type of shuttle used to transport electrons from the cytosol into the mitochondrion.
    •                                                                                                                                       i.      Inner membrane is impermeable to NADH, so it is segregated from machinery of oxidative phosphorylation
    • 1.      Two electrons of NADH must be conveyed by one of several electron shuttle systems
    • a.      NAD+ (2.5 ATP) or FAD (1.5 ATP)
    • c.       Proton-motive force generated by the redox reactions drives other kinds of work
  5. "Times New Roman"'>molecules
    • style='mso-bidi-font-weight:normal'> m:val="roman"/>686 m:val="roman"/> style='mso-bidi-font-weight:normal'>kcal style='mso-bidi-font-weight:normal'> m:val="roman"/> style='mso-bidi-font-weight:normal'>per style='mso-bidi-font-weight:normal'> m:val="roman"/> style='mso-bidi-font-weight:normal'>mole style='mso-bidi-font-weight:normal'> m:val="roman"/> style='mso-bidi-font-weight:normal'>of style='mso-bidi-font-weight:normal'> m:val="roman"/> style='mso-bidi-font-weight:normal'>glucose style='mso-bidi-font-weight:normal'> m:val="b"/> style='font-size:12.0pt;line-height:115%;font-family:"Cambria Math","serif";
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    • mso-hansi-font-family:"Times New Roman";mso-bidi-font-family:"Times New Roman"'> m:val="roman"/> m:val="b"/>100= m:val="roman"/>34 m:val="b"/>%
    •                                                           iv.       The rest of the energy stored in glucose is lost as heat
  6. Adaptation in hibernating mammals 
    __ is made up of cells packed full of __
    a.      The inner mitochondrial membrane contains a channel protein called the __, which allows protons to flow back down their concentration gradient without generating ATP
                                                                                                                                          i.      Activation of these proteins in hibernating mammals results in ongoing __ of stored fuel stores (fats), generating heat without __
    • Brown fat
    • mitochondria
    • uncoupling protein
    • oxidation
    • ATP

Card Set Information

Summary of Cellular Respiration
2012-11-11 13:38:45
Test III cell resp

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