Cellular Respiration

Topics: Cellular respiration, Adenosine triphosphate, Citric acid cycle Pages: 2 (737 words) Published: August 27, 2010
Cellular Respiration
Cellular respiration is a chemical process that produces adenosine triphosphate, or otherwise known as ATP for energy that is also needed to survive. It leaves waste products, carbon dioxide and water, which is needed for photosynthesis, a process that only plants use. Production of ATP through the process of cellular respiration occurs in the mitochondria of the cytosol inside plant and animal cells. Cellular respiration occurs in three stages, Glycolysis, which happens in the cytosol, Krebs cycle, which takes place in the matrix of the mitochondria, and electron transport chain, which happens in the cristae of the mitochondria. The first stage of this process is Glycolysis: Glycolysis first breaks down a glucose molecule, which is a very important sugar molecule for living things. Since glucose is a six-carbon molecule, it splits into two pyruvic acids (pyruvate). In this stage, two ATP molecules are used and four ATP molecules are made, so it makes a sum of two ATP molecules. Pyruvic acid gives high-energy electrons to NAD positive which makes two NADH. In conclusion, glycolysis produced two ATP molecules, two NADH, and two pyruvate molecules. The Krebs cycle, the second stage of respiration, first starts with breaking down pyruvic acid from the glycolysis into Acetyl CoA. It is to make the pyruvate more usable in the Krebs cycle but in this “process”, carbon dioxide diffuses out. After acetyl CoA forms, the eight steps of the cycle start. First, Acetyl CoA is transferred to the oxaloacetate group by CoenzymeA to form citrate. NAD+ (Nicotinamide adenine dinucleotide), an enzyme carrier, is used and turned into NADH when an electron is loaded on it. The electrons are taken to the electron transport chain. Oxalosuccinate molecules go to Succinyl CoA when two carbon dioxides are taken out and an electron carrier (NAD+) is loaded with electrons. Succinyl CoA follows up. In this part, GTP (guanosine triphosphate) turns into GDP (guanosine...
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • Principles Of Cellular Respiration Essay
  • Cellular Respiration and Energy Creation Essay
  • Mitochondria: Cellular Respiration and Inner Membrane Essay
  • Cellular Respiration Essay
  • Essay about Photosynthesis and Cellular Respiration
  • Cellular Respiration Through Alcoholic Fermentation Essay
  • A Study of Cellular Respiration and Gas Production in Peas Essay
  • Metabolism: Cellular Respiration and New World Encyclopedia Essay

Become a StudyMode Member

Sign Up - It's Free