One of the following is not true about ATP

Explanation

It is possible to make calculations of the net gainkof ATP for every glucose is oxidised. These calculations can be made only on certain assumptions that :
1) There is a sequential, orderly pathway functioning with one substrate forming the next and with glycolysis, TCA cycle, ETS pathway following one after another.
2) The NADH synthesised in glycolysis is transferred into the mitochondria and undergoes oxidative phosphorylation.
3) None of the intermediates in the pathway are utilised to synthesize any other compound.
4) Only glucose is being transferred - no other alternative substrates are entering in the pathway at any of the intermediary stages.
But these kind of assumption are not really valid in a living system all pathways work simultaneously and do hot take place one after another.