Hey guys,
What are the inputs and outputs of the three stages of aerobic respiration (glycolysis, kreb cycle, electron transport chain)?
I've read my textbook as well as online but the exact number of molecules are different.
Also, how much ATP is produced by the ETC and aerobic respiration as a whole? I have heard that there is disagreement over the number of ATP produced.
Thank you!
Hey
So for the exact numbers of inputs/outputs of the various stages does have some discrepancies between different sources so if you want to memorise them, then memorise the ones that your teacher gives you - otherwise don't worry about it since you don't actually need the memorise the exact number of the inputs (e.g amount of NAD input)
Glycolysis
Input: Glucose, NAD, ADP +Pi
Output: Pyruvate, NADH, 2ATP
Krebs Cycle
Input: Acetyl CoA (or pyruvate however there is actually a transition stage which converts the pyruvate into Actyl coA prior to entering into the krebs cycle), ADP +Pi, FAD, NAD
Output: CO2, 2ATP, FADH2, NADH
Electron Transport
Input: NADH, FADH2, ADP+Pi, O2
Outputs: NAD, FAD, 34ATP, H2O
So 2+2+34 = 38 ATP produced in total
However, of course, in reality this ideal 38 ATP produced is not always the case as the cell can "lose" pyruvates or possibly expend more energy in adverse conditions etcetera. Despite this being said, in past VCE exams, I've seen that they've generally accepted a range of answers e.g. 36/38. Although it is best to just stick with whatever your teacher tells you