Assertion : Glycolysis is the first step of respiration in which glucose completely breaks into CO2 and H2O.
Reason : In this process, there is net gain of twenty four molecules of ATP.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
D.
If both assertion and reason are false
Glycolysis is a process in which a molecule of glucose (6C) is degraded in a series of enzyme- catalyzed reactions to yield two molecules of pyruvate (3C). This process releases energy (ATP) and reducing power (NADH2). It is a first step of respiration that occurs inside the cytoplasm and is independent of O2.
In glycolysis, two molecules of ATP are consumed during double phosphorylation of glucose to form Fructose 1, 6 Diphosphate. Four molecules of ATP are produced in the conversion of 1, 3- Diphosphoglycerate to 3- Phosphoglycerate and Phosphenol Pyruvate to Pyruvate whereas, two molecules of NADH2 are formed during oxidation of glyceraldehyde 3-phosphate to 1, 3-Diphosphoglycerate. Since, each NADH is equivalent to 3 ATP, so net gain in glycolysis is 8 ATP.
