Biochemistry - Carbohydrate - Discussion

For gluconeogenesis to occur there must be the presence of 4 ATP and 2 GTP in which for this case gtp is equivalent to ATP hence 6 ATP are required.

The number of carbon atom in glucose is 6.

The number of carbon atom present in glucose is 6 which makes it an aldohexose.

Glycolysis is an exergonic process it does not need energy to happens.

In glycolysis 2 atp and 2 NADH is produced which each NADH will convert to 3 atps during oxidative phosphorylation so 2 atps plus 6 atps is produced. So gluconeogenesis need 8 atps to produce glucose.

You know how glycolysis uses a total number of 2 atp and produces (2+2) 4 atps. So we know that gluconegenesis is the reverse of glycolysis and we know that the last step which produced 2 atp by converting pep to pyruvate is now divided into two steps of their own (pyruvate-> oaa and oaa-> pep).

Glycolysis is like this : 2 + 2 = 4.

Gluconeogenesis : 2 + (2 atp +2 gtp) = 6 which means we need a total of 6 to go ahead.

Side note:

Remember that we used two atp in glycolysis to begin with and now we are producing them with gluconeogenesis- we hydrolyze instead!

How does it happen?