How Well Do You Know Cellular Respiration?

Cellular respiration is a catabolic reaction that breaks down nutrients to release energy, which is stored in the form of ATP. It is significant because it provides energy for various metabolic processes in the cell.

The four stages of cellular respiration are glycolysis, formation of acetyl CoA, Krebs cycle (TCA cycle or Citric Acid Cycle), and Electron Transport System and Oxidative Phosphorylation. Glycolysis partially oxidizes glucose to form pyruvate, which enters the mitochondrial matrix and undergoes oxidative decarboxylation to form Acetyl CoA. The Acetyl CoA produced enters the tricarboxylic acid cycle or citric acid cycle, where glucose is fully oxidized and energy is stored in ATP and other high-energy compounds like NADH and FADH2. ATP is generated in the Electron Transport System and Oxidative Phosphorylation when electrons are transferred from NADH and FADH2 to molecular O2 by a series of electron carriers.

The Krebs cycle is the common pathway for complete oxidation of carbohydrates, proteins, and lipids as they are metabolized to acetyl coenzyme A or other intermediates of the cycle. The Acetyl CoA produced enters the tricarboxylic acid cycle or citric acid cycle, where glucose is fully oxidized and energy is stored in ATP and other high-energy compounds like NADH and FADH2.

<p>Cellular respiration is a catabolic reaction taking place in the cells. It is a biochemical process by which nutrients are broken down to release energy, which gets stored in the form of ATP and waste products are released.</p> Signup and view all the answers

<p>In aerobic respiration, oxygen is required, while in anaerobic respiration, oxygen is not required.</p> Signup and view all the answers

<p>The four stages of cellular respiration are glycolysis, formation of Acetyl CoA, Krebs cycle (TCA cycle or Citric Acid Cycle), and Electron Transport System and Oxidative Phosphorylation.</p> Signup and view all the answers