Question

if kreb cycles donot occur what happen?

Answer 1

The citric acid cycle (CAC) – also known as the tricarboxylic acid (TCA) cycle or the Krebs cycle– is a series of chemical reactionsused by all aerobic organisms to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins into carbon dioxide and chemical energy in the form of adenosine triphosphate(ATP). In addition, the cycle provides precursors of certain amino acids, as well as the reducing agent NADH, that are used in numerous other biochemical reactions. Its central importance to many biochemical pathways suggests that it was one of the earliest established components of cellular metabolism and may have originated abiogenically.

In addition to the supply of energy from the fuel molecules, the citric acid cycle has other important functions. Thus, some of the citric acid cycle are intermediates for other important reactions like the biosynthesis of glucose, fatty acids and amino acids.