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Cellular Respiration
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Links 2 life
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Terms and Names Simplified
Glycolysis
Visual Aids
Transition Reactions
Krebs Cycle
Electron Transport Chain

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So you want to learn about cellular respiration? Or maybe you just weren't listening when your teacher was explaining it during class. Don't worry! I have everything a teacher would have said plus my own more simplified versions of everything in cell respiration. 


Lets start off with the basics. The purpose of cellular respiration is to create a form of energy useable by the cell. This energy is created in the form of ATP (adenosine triphosphate).
Cellular respiration can be split up into four sequences.
-Glycolysis
-Transition Reactions
-Krebs Cycle or Citric Cycle
-Electron Transport Chain

Glycolysis- All in all the purpose of glycolysis is to break down one molecule glucose into two molecules of pyruvate. The pyruvate molecules are than individually sent to the transition reactions. Glycolysis has two Products, H20 and NADH. Overall Glycolysis makes four ATP but its net gain is two ATP due to the fact that it uses two ATP in the process.
 
Transition Reactions- The purpose of the transition reactions is to take two hydrogen electrons and one carbon dioxide away from the pyruvate and add a coenzyme called Coenzyme A. The new acetyl Co-A is ready to be sent to the Krebs Cycle. 
 
Krebs Cycle- The purpose of the Krebs Cycle is basically to produce NADH+H and FADH2. Pyruvate enters the Krebs Cycle than goes through a series of reactions and the final product is six NADH+H and two FADH2. These energy carriers are than sent to the electron transport chain. The Krebs cycle  Goes around twice for every molecule of acetyl Co-A.
 
Electron Transport Chain- The purpose of the electron transport chain is to make the majority of ATP created in cellular respiration. The NADH and FADH2 from the Krebs Cycle drop their electrons at the starting of the electron transport chain. As the electrons move along the electron transport chain they give it power to pump hydrogen across the membrane from the matrix into the intermediate space. This creates a concentration gradient forcing the hydrogen through ATP synthase bounding ADP with Pi ( inorganic Phosphate). As the electrons move along the transport chain they lose their energy and at the end are picked up by oxygen and bonding with hydrogen making the bi-product H20.