Aerobic and Anaerobic Respiration - Definition, Steps, Diagram

Hey folks! Do you know that Aerobic and Anaerobic Respiration respiration and breathing are not the same and combustion occurs in our body too? Ever heard that respiration occurs without oxygen in some organisms?

Cellular Respiration

Introduction:

Definition:

Steps in Respiration:

• Breathing and gaseous exchange

• Gaseous transport through the blood

• Oxidation of food inside the cell.

Glycolysis:

• This is the first step in cellular respiration in all organisms.
• Inside the cytoplasm of the cell, the process of glycolysis occurs.
• In this process, one glucose (a 6-carbon sugar)molecule is broken down into two molecules of pyruvic acid or pyruvate(a 3-carbon molecule ).
• Oxygen is not necessary for the procedure. The production of CO2 is also zero.
• A small amount of ATP is generated as energy during this process.

Aerobic Respiration:

Krebs’ cycle:

• The Krebs cycle is also known as the citric acid or Tricarboxylic acid cycle.
• This step occurs mainly in mitochondria.
• Each pyruvate molecule from glycolysis is completely oxidised to produce 3 molecules of Carbon dioxide.
• In this way, 6 molecules of CO2 are produced from 2 molecules of pyruvate.
• Reduced Coenzymes are produced from this process which contains a lot of energy.

Electron Transfer Chain (ETC)

• It is the final step in producing ATP.
• This also occurs inside the mitochondria.
• In this process, the reduced coenzymes produced during Krebs’ cycle are oxidised with the oxygen's help.
• At last, the water molecules are produced.
• During this, a lot of energy is released, stored as ATP.

Centriole

Anaerobic Respiration

Fermentation: