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Old 06-05-2012
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Question Gibs free energy change?

What the hell is "gibs free energy change"?

What do we have to know about it regarding step 1?
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Old 06-05-2012
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yea you need to know it
i had a question on it the last nbme i did.
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Basically what WE need to know -
- know the formula
- Exogernic Reactions: Heat is given off or released during the reaction.
- Endogernic Reactions: Heat is consumed or used during the reaction.
- If G = 0: Energy is neither given off or used.
- If G > 0: Energy is consumed.
- If G < 0: Energy is released.


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Old 06-05-2012
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You need to have a basic understanding of Gibbs free energy to able to answer some biochem questions. Without it you won't be able to answer which direction the reaction will go in reversible reactions.

Eg: In Glycolysis, except for the reactions catalyzed by Hexokinase, PFK1, and pyruvate kinase, all the other reactions are reversible. And if u get a question about any of these reversible enzymes and the concentration of their respective substrates, you need to know Gibbs to answer it.
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Old 06-05-2012
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Thnx guys, i hand-picked the info i think i need to know.

G is negative
--------------
-The reaction favours product formation (referred to as spontanous)
-The energy of the products is lower than the energy of the substrates
-Conclusion: energy is released.

G is positive
-------------
- The reaction favours substrates formation
-The energy of the substrates is lower than that of the products.
Conclusion: energy is consumed

Slammed this on the first page of metabolism!
I'm not gonna dig deeper than this, I barely have enough energy left for reviewing stuff i already know.
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