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Lipid and carbohydrate

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Lipid and carbohydrate

Postby jiro on Mon Nov 14, 2005 9:59 pm

Can anyone tell me why lipid is a better source of energy than carbohydrate?
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Postby mmiaosmiling on Tue Nov 15, 2005 1:12 am

lipid is highly deoxidized compound that contains much more energy than carbohydrate and organisms dont have to take too much hydration water for storing it.
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Postby nugnug on Tue Nov 15, 2005 3:41 am

isn't lipid a long-term source of energy and carbs are a short-term?
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Postby Fried Zygote Sandwich on Tue Nov 15, 2005 8:17 am

More C-C bonds in lipids.

Combustion of carbon compounds leads to the creation of energy, or ATP, NADH2, and heat. Or something along those lines. Anyway lipids are mainly just long carbon chains with attached hydrogen atoms.
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Postby mmiaosmiling on Tue Nov 15, 2005 9:57 am

nugnug wrote:isn't lipid a long-term source of energy and carbs are a short-term?


yeah but lipid is easier for storage.and what is of more importance is the heat of combustion released by lipid is 37kJ(9 kcal) per gram and relersed by carbohydrate is only 17kJ(4 kcal)/g.

in addition,lipid can be used for heat-preservation and it is cushion sometimes...
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Postby jiro on Tue Nov 15, 2005 2:52 pm

Thanks for your replies!
I still don't understand why lipid is a better source of energy because it is richer in carbon and hydrogen that carbohydrate. I am a-level student, and I don't really get how ATP is made...
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Postby MrMistery on Tue Nov 15, 2005 9:37 pm

ATP is made during cell respiration, a very complex mechanism. I'm afraid there is no real way to explain it other the chemical explanation.
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Postby victor on Wed Nov 16, 2005 12:21 pm

How to made ATP? it's easy...
just attach three groups of Phospate group and nitrogenouse base [adenine] into a ribose... :lol:

How to product ATP...it's a complex and many mechanisms..just like Mr.Cheese said..
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A: They have all the solutions.
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Postby mmiaosmiling on Thu Nov 17, 2005 2:44 pm

in my text book it says that ATP is the current 'coins' of energy in a cell.
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