Glycolysis: Glycolytic Pathway: Aerobic Respiration

Glycolysis: Glycolytic Pathway: Aerobic Respiration

Let’s study Glycolysis, Glycolytic Pathway and  Aerobic Respiration:

Glycolysis:

  • Glycolysis is a metabolic pathway that converts glucose into pyruvate.
  • It is the first step in cellular respiration, and it can occur in both aerobic and anaerobic conditions.
  • Glycolysis consists of 10 enzymatic reactions, and it produces a net yield of 2 ATP molecules.
  • In aerobic conditions, pyruvate is further oxidized in the citric acid cycle and electron transport chain, producing a total of 32 ATP molecules.
  • In anaerobic conditions, pyruvate is converted to lactate, producing 2 ATP molecules.
Bioenergetics Of Glycolysis:

The bioenergetics of glycolysis refers to the energy changes that occur during the process of glycolysis. Glycolysis is a metabolic pathway that converts glucose into pyruvate, and it can occur in both aerobic and anaerobic conditions.

In aerobic conditions, glycolysis produces a net yield of 2 ATP molecules. This is because two ATP molecules are used in the early steps of glycolysis, but four ATP molecules are produced in the later steps. The net yield of ATP is therefore, In anaerobic conditions, glycolysis produces a net yield of 2 ATP molecules, plus 2 NADH molecules. NADH is a reducing agent, and it can donate electrons to the electron transport chain. The electron transport chain produces a total of 32 ATP molecules, for a net yield of 34 ATP molecules.

Glycolytic pathway

  • The glycolytic pathway is also known as the Embden-Meyerhof-Parnas pathway.
  • It is a series of enzymatic reactions that occur in the cytoplasm of cells.
  • The glycolytic pathway is divided into two phases: the preparatory phase and the pay-off phase.
  • The preparatory phase converts glucose into glucose-6-phosphate, fructose-6-phosphate, and fructose-1,6-bisphosphate.
  • The pay-off phase converts fructose-1,6-bisphosphate into pyruvate, NADH, and ATP.

Aerobic respiration

  • Aerobic respiration is a process that cells use to extract energy from glucose in the presence of oxygen.
  • It is a more efficient process than anaerobic respiration, and it produces more ATP molecules.
  • Aerobic respiration consists of three stages: glycolysis, the citric acid cycle, and the electron transport chain.
  • The net yield of aerobic respiration is 32 ATP molecules.
Attempt this short Quiz to test yourself:
5
Created on By mdcatpk

Glycolysis

1 / 6

What is the net yield of ATP molecules from aerobic respiration?

2 / 6

Where does aerobic respiration take place in the cell?

3 / 6

What is the final product of glycolysis in anaerobic conditions?

4 / 6

In which phase of glycolysis are two ATP molecules used?

5 / 6

Which of the following is NOT a product of glycolysis?

6 / 6

What is the net yield of ATP molecules from glycolysis?

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