Question

How many net ATP are formed during glycolysis?

		6
		4
		2
		10

Answer 1

In glycolysis there are 2 steps :

1.preparatory phase

2.pay off phase

In preparatory phase 2 molecules of ATP consumed to conversion of glucose to fructose -1,6- bis phosphate.

But in pay off phase, 2 molecules of ATP produced when the conversion of 1,3- bisphospho glycerate to 3- phosphoglycerate takes place. And another 2 molecules of ATP produced in conversion of phosphoenol pyruvate to pyruvate.

So , total 4 ATP produced and 2 ATP consumed. Therefore, the net ATP formed during glycolysis is 4-2= 2

Hence the answer is 2.