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Co2 from respiration-Sugars vs Fats

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Co2 from respiration-Sugars vs Fats

Postby key » Sat Feb 09, 2013 2:28 am

So more co2 is produced from glucose than from fat; correct?

Say you had two 2000cal diet one being 60%carb and the other 30%carb, how much more co2 would you produce on 60% carb?

Thank you
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Postby JackBean » Sat Feb 09, 2013 12:37 pm

That's because fats are more reduced thus you get more energy (calories) per molecule or weight.
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby key » Mon Feb 11, 2013 12:00 am

okay so are fats more reduced because sugar has more oxygens?
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Postby JackBean » Mon Feb 11, 2013 3:31 pm

yes, that's kind of the point
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby key » Mon Feb 11, 2013 10:40 pm

so if I compared (3) c6h12o6 and (1) c18h36o2 would the sugars make 8 more co2 than the fat?
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Postby JackBean » Tue Feb 12, 2013 10:12 am

1) the atoms are capitals
2) why do you think that sugar would make 8 more CO2?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby key » Wed Feb 13, 2013 12:12 am

C18H36O18 vs C18H36O2, sugar has 16 extra oxygen, so 16O pick up 8C and make 8CO2?
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Postby JackBean » Wed Feb 13, 2013 7:18 pm

and where will you get the carbons?
http://www.biolib.cz/en/main/

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Postby key » Thu Feb 14, 2013 5:04 am

lol idk, is the extra co2 just from pyruvate dehydrogenase step? so C18H36O18 vs stearic acid would only give 6 extra co2 since that would be (6) C3H6O3
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Postby JackBean » Thu Feb 14, 2013 8:36 am

No, it's C6H12O6, which will give only 6 CO2, stearic acid is C18HsomethingO2, which will give 18 CO2 with the oxygens coming somewhere from water
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby key » Sat Feb 16, 2013 7:41 pm

okay I'm obviously a noob :)

my understanding:
you get 3 CO2 during the process pyruvate-->energy

you get 2 CO2 during the process Aceytl-CoA-->energy

so C6H12O6 would make 6 CO2 and 36 ATP

stearic acid would make 18 CO2 and 120 ATP

so 120 ATP of sugar = 20 CO2?
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Postby JackBean » Sat Feb 16, 2013 10:00 pm

That seems about right.
http://www.biolib.cz/en/main/

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