What is Krebs Cycle?
It is an aerobic process in which the pyruvic acid produced in the process of glycolysis degrades. It occurs in the mitochondria of the cell. The pyruvic acid undergoes complete oxidation to produce carbon dioxide and water. Krebs cycle is the second step of respiration after glycolysis. The Krebs cycle requires oxygen. It is the cyclic sequence. It is also called as Citric acid cycle or TCA. Glucose gets completely oxidized to produce acetyl CoA which enters the citric acid cycle and further combines with carbon compound oxaloacetate to form 6C citrate. In this process 2 molecules of CO2 are released with the recycling of oxaloacetate and the energy is stored in the form of ATP, NADH, and FADH.
Difference Between Glycolysis and Krebs Cycle
The main difference between Glycolysis and Krebs Cycle is that: Glycolysis is the first step of respiration in which one molecule of glucose undergoes partial oxidation to produce two molecules of pyruvic acids, ATP, NADH, and water. It is an anaerobic process that occurs in the cytoplasm of the cell. Krebs cycle is the second step of respiration in which the pyruvic acid produced in glycolysis degrades after complete oxidation to produce carbon dioxide and water. It is an aerobic process that occurs in the mitochondria of the cell. Glycolysis is the linear sequence that does not require oxygen whereas the Krebs cycle is a cyclic sequence that requires oxygen.