Warum kommt es zu einem Energiegewinn beim Oxidieren von organischen Stoffen in unseren Zellen?
In meinem Buch steht folgendes: “Es sieht immer so aus, als sei die Oxidationsstraße bei der Carbonsäure zu Ende. Unsere Zellen oxidieren aber auch jetzt noch weiter – die organischen Stoffe sollen schließlich unter Energiegewinn bis zur Stufe von CO2 und H2O abgebaut werden. Entscheidend ist allerdings, dass dafür die Moleküle nun zerlegt werden müssen.”
Ich versteh das vorne und hinten nicht, warum es überhaupt zu einem Energiegewinnn kommt, da es ja ENERGIE VERBRAUCHT, wenn Bindungen gespalten werden.
Wieso kommt es dann dennoch zu einem Energiegewinn?
Im Buch wird zuvor die Oxidationsstraße von Primären Alkohol zu Aldehyd und dann zu Carbonsäure gezeigt
Und die Oxidationsstraße von Sekundären Alkoholen zu Keton.
Und dann steht da halt obiger Text, dass es eben weitergeht mit der Oxidation.
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You’re right, splitting bonds needs energy. However, bonds also release them. And that’s all about it.
Broken rough down: The body ties low-energy bonds (the ones of CO2 and H2O), thereby releasing a lot of energy. This energy can be used to split bonds, for example those of the carboxylic acid in order to make them CO2 and H2 O again. The bonds of the carboxylic acid, however, cost less energy than when the bonds of CO2 and H2 O are combined. This remaining energy can then be used by the body.
Okay, thanks for the answer!
So it can be said that, for example, in the entire oxidation line from the primary alcohol to CO2 and H2O, only energy is consumed all the time, except at the end where CO2 and H2O are formed? And in this last reaction, more energy is recovered than was previously consumed as a whole?
Or can one only say that energy is recovered at the bottom but not consume all the reactions to the last (which leads to H2O and CO2) energy? In other words, are there always reactions that occur under energy gains in the oxidation road?
And what about ATP? When does that come into play?
Just under the line. What happens in between depends on the exact process. I don’t know what exactly they are.
ATP is the “energy currency” of the body. It is produced in energy-generating processes, then transported to another place to drive an energy-consuming process there. ATP is almost the petrol of the metabolic engine.
At least the oxidation of ethanol of acetic acid releases energy. Acetic acid was prepared so early. Every single step I don’t have in mind. However, it is not possible to say that all steps are endothermic.
You always have to have the conditions in mind. Primary alcohols can be oxidized to the aldehyde and further to the carboxylic acid, not at all secondary to the ketone and tertiary, OTHER COAL REQUIREMENTS. You like to forget that, or it wasn’t said so clearly.
For example, if you continue oxidizing acetic acid, you will ultimately obtain carbon dioxide and water. The new bonds between carbon and oxygen or Hydrogen and oxygen supply more than enough energy to split the carbon-carbon and carbon-hydrogen bonds.