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Author Topic: Can someone please tell me if this is correct? Thank you.  (Read 3692 times)  Share 

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APPLEhead

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Can someone please tell me if this is correct? Thank you.
« on: June 07, 2012, 01:59:55 pm »
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Glycolysis
Inputs: (per glucose molecule)
            2NAD+
            1 glucose molecule
Outputs: 2 three-carbon molecules (2 pyruvates)
               2ATP
               2NADH

Krebs Cycle
Inputs: (per glucose molecule)
             2 pyruvates
             8NAD+
             2FAD2
             2ADP + Pi
Outputs: 8NADH
              2FADH2
              2ATP
              6CO2

Electron Transport
Inputs: (per glucose molecule)
           8NADH
           2FADH2
           6CO2
           32-34ADP + Pi
Outputs: 8NAD+
              2FAD2+
              6H2O
              32-34ATP


I'm not sure about the FAD2 though. Is it FAD2+ or just FAD2? And is it even FAD2? Or just FAD? Help will be greatly appreciated. Thank you :)

APPLEhead

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Re: Can someone please tell me if this is correct? Thank you.
« Reply #1 on: June 07, 2012, 02:02:11 pm »
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And also which stage requires oxygen? The Krebs Cycle or Electron Transport?

jasoN-

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Re: Can someone please tell me if this is correct? Thank you.
« Reply #2 on: June 07, 2012, 02:11:44 pm »
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Glycolysis:
Input: 2ATP, 2NAD+, 1 glucose
Output: 4ATP (net 2ATP), 2NADH, 2 pyruvate

Intermediate step:
Input: 2 pyruvate, 2NAD+
Output: 2 Acetyl-CoA, 2NADH

Krebs:
Input: 2 Acetyl-CoA, 6NAD+, 2FAD, 2GDP+Pi (equivalent to ATP)
Output: 2GTP(=2ATP), 6NADH, 2FADH2, 6CO2

ETC:
Input: 10NADH, 2FADH2
Output: 30+4 = 34ATP
You also get 2ATP from glycolysis, and 2ATP from Krebs

OVERALL: 38 ATP (ASSUMING PROCESS IS 100% EFFICIENT, in reality it's not)

The Krebs cycle occurs in the mitochondria under AEROBIC conditions
The ETC uses oxygen and reduces it to form water
« Last Edit: June 07, 2012, 03:28:39 pm by jasoN- »
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Scooby

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Re: Can someone please tell me if this is correct? Thank you.
« Reply #3 on: June 07, 2012, 07:09:31 pm »
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Electron Transport
Inputs: (per glucose molecule)
           8NADH
           2FADH2
           6CO2
           32-34ADP + Pi
Outputs: 8NAD+
              2FAD2+
              6H2O
              32-34ATP

Oxygen is an input into the electron transport chain, rather than carbon dioxide :)

I'm not sure about the FAD2 though. Is it FAD2+ or just FAD2? And is it even FAD2? Or just FAD? Help will be greatly appreciated. Thank you :)

In the Krebs cycle, FAD is reduced - it gains two electrons and two hydrogen ions - to form FADH2. That FADH2 is then used in the electron transport chain.
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