How many steps of glycolysis are irreversible?

3 s t e p - 1^{s t}, 3^{r d} a n d l a s t

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3 s t e p - 1^{s t}, 5^{t h} a n d l a s t

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2 step–

1^{s t}

and last

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1^{s t} s t e p o n l y

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Solution

The correct option is A $3 s t e p - 1^{s t}, 3^{r d} a n d l a s t$
Glycolysis is a metabolic pathway that converts glucose into pyruvate. The free energy released in this process is used as ATP and NADP.
There are ten steps in the glycolysis pathway out of which 7 are reversible and 3 are irreversible. The irreversible steps are:

$1^{s t}$ step – glucose to glucose-6 phosphate

$3^{r d}$ step - fructose 6 phosphate to fructose 1,6 phosphate

Last step - 2 PEP to 2 pyruvates.

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