Q. Which group of the following scientists discovered the EMP pathway of glycolysis?
NTA AbhyasNTA Abhyas 2020
Solution:
Glycolysis / EMP pathway:
(1) Discovery: It is given by Embden, Meyerhoff and Parnas in 1930. It is the first stage of the breakdown of glucose in the cell.
(2) Definition: Glycolysis (Gr. glykys= sweet, sugar; lysis= breaking) is a stepped process by which one molecule of glucose (6C) breaks into two molecules of pyruvic acid (3C).
(3) Site of occurrence: Glycolysis takes place in the cytosol and does not utilise oxygen. Thus, it is an anaerobic pathway. In fact, it occurs in both aerobic and anaerobic respiration.
Steps of glycolysis: Glycolysis consists of 10 steps divided into 2 phases, preparatory phase and pay off phase. Each step is catalysed by a specific enzyme. Most of the reactions are reversible.
Preparatory phase: In this phase, 2 molecules of ATP are utilised.
Pay-off phase: In this phase, energy is released in the form of ATP and NADH2 is formed.
(1) Discovery: It is given by Embden, Meyerhoff and Parnas in 1930. It is the first stage of the breakdown of glucose in the cell.
(2) Definition: Glycolysis (Gr. glykys= sweet, sugar; lysis= breaking) is a stepped process by which one molecule of glucose (6C) breaks into two molecules of pyruvic acid (3C).
(3) Site of occurrence: Glycolysis takes place in the cytosol and does not utilise oxygen. Thus, it is an anaerobic pathway. In fact, it occurs in both aerobic and anaerobic respiration.
Steps of glycolysis: Glycolysis consists of 10 steps divided into 2 phases, preparatory phase and pay off phase. Each step is catalysed by a specific enzyme. Most of the reactions are reversible.
Preparatory phase: In this phase, 2 molecules of ATP are utilised.
Pay-off phase: In this phase, energy is released in the form of ATP and NADH2 is formed.