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Cellular respiration questions..

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Cellular respiration questions..

Postby molecool » Mon Nov 07, 2011 4:32 am

Why are a lot of high energy electrons formed during glycolysis if the cell generates large amounts of ATP and be a problem ?and in the Krebs Cycle high energy electrons can be used to generate huge amounts of ATP?i'm kind of confused...and also the book I have says ″One carbon atom from pyruvic acid becomes part of a molecule of carbon dioxide″isn't that molecule Oxygen then forming carbon dioxide?Also, before Acetyl has the 2 carbon atoms what is it come and where do the 1 oxygen and 3 hydrogen atoms come from..sorry I can't help but wonder :P

thank-you in advance!!
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Postby JackBean » Mon Nov 07, 2011 8:44 am

sorry, but cannot help, but don't understand. Try to write it once again and understandable this time.
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Re: Cellular respiration questions..

Postby chrisPbacon » Mon Nov 07, 2011 11:57 pm

For one you are missing the main concept of cellular respiration. The whole entire process of cellular respiration can be simplified as the breakdown of glucose (C6H12O6) to carbon dioxide, water, and energy. Why do cells carry out cellular respiration? So they can build up ATP molecules.

The entire process of cellular respiration only "yields a maximum of 36 or 38 ATP molecules." At the beginning of glycolysis it used 2 ATP to activate glucose, which results in the C6 molecule splitting and C3 pyruvate resulting (G3P). The energy investment step requires 2 ATP, and the energy harvesting step produces 4 ATP. Totaling in a net gain of only 2 ATP.

During the krebs cycle enzymes pass high energy PHOSPHATE to ADP, which results in ATP. Substrate-level ATP synthesis happens twice because the krebs cycle turns twice per glucose molecule.

The pryruvic acid joins with 2 CoA and becomes part of the Carbon dioxide molecule, I don't understand what you mean by "isnt that molecule Oxygen" no its a molecule of carbon dioxide.

And where are you getting 1 oxygen and 3 hydrogen atoms? It makes no sense.

From what I am getting you need to study no offense.
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Re: Cellular respiration questions..

Postby molecool » Tue Nov 08, 2011 2:12 am

The more I study the more questions I get :lol: Thank-you for answering my nonsense!
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Postby chrisPbacon » Tue Nov 08, 2011 2:40 am

Elaborate on what you meant by 1 oxygen and 3 hydrogen atoms.
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