Overview and steps of the citric acid cycle, also known as the Krebs cycle or tricarboxylic acid (TCA) cycle.

MCAT Course: MCAT > Unit 6 Lesson 17: Krebs (citric acid) cycle and oxidative phosphorylation

Overview of the Krebs or citric acid cycle, which is a series of reactions that takes in acetyl CoA and produces carbon dioxide, NADH, FADH2, and ATP or GTP.

How pyruvate from glycolysis is converted to acetyl CoA so it can enter the citric acid cycle. Pyruvate is modified by removal of a carboxyl group followed by oxidation, and then attached to Coenzyme A.

A One acetyl CoA and three NAD + ‍ molecules. B One oxaloacetic acid and three NAD + ‍ molecules. C Three FAD ‍ molecules and one ADP ‍ molecule. D

Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP. The stages of cellular respiration include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative …

The citric acid cycle, always active to varying degrees, is crucial for ATP production. Acetyl-CoA enters the cycle, undergoes oxidations, and exits as carbon dioxide, producing FADH2 and NADH.

图片来源：修改自 "Oxidation of pyruvate and citric acid cycle: Figure 2" by OpenStax College, Biology, CC BY 3.0 无论你喜欢叫它什么，柠檬酸循环是细胞呼吸的核心驱动。

Amino acids, lipids, and other carbohydrates can be converted to various intermediates of glycolysis and the citric acid cycle, allowing them to slip into the cellular respiration pathway through a multitude of …

The citric acid cycle takes place in the fluid space (matrix) of a cell’s mitochondria. During the citric acid cycle, pyruvic acid (from glycolysis) is broken down through a series of chemical reactions to …