How many ATP are produced by 1 glucose in aerobic Respiration?

I will explain in the simplest possible manner. Just keep an account of ATP, NADH, FADH2. Complete Glucose Oxidation follows : Glycolysis (Glucose > 2Pyruvic Acid) - Here 2 ATPs are produced by substrate level phosphorylation and 2 NADH are also produced . Transition Step ( Pyruvic acid> Acetyl CoA). read more

1 mole of glucose = 6.023x10^23 molecules of glucose It is well known that generally 1 molecule of glucose generates about 36 ATPs, so 6.023x10^23 molecules of glucose will produce (36 x 6.023x10^23) ATP molecules. read more

So, Total substrate level ATP produced from one molecule of glucose in aerobic respiration is 4+2(4 from glycolysis + 2 from TCA cycle)=6 & net ATP is 2+2=4. Now lets talk about the pictures you have attached. In fact, All of them are right. read more

two molecules of pyruvic acid, two molecules of NAD+, and a net gain of two ATP. read more