Krebs Cycle is also known as the Citric Acid Cycle.
The citric acid cycle begins with acetyl-CoA transferring its two-carbon acetyl group to the four-carbon acceptor compound (oxaloacetate) to form a six-carbon compound (citrate).
The citrate then goes through a series of chemical transformations, losing first one, then a second carboxyl group as CO2. The carbons lost as CO2 originate from what was oxaloacetate, not directly from acetyl-CoA. The carbons donated by acetyl-CoA become part of the oxaloacetate carbon backbone after the first turn of the citric acid cycle. Loss of the acetyl-CoA-donated carbons as CO2 requires several turns of the citric acid cycle. However, because of the role of the citric acid cycle in anabolism, they may not be lost since many TCA cycle intermediates are also used as precursors for the biosynthesis of other molecules.[4]
Most of the energy made available by the oxidative steps of the cycle is transferred as energy-rich electrons to NAD+, forming NADH. For each acetyl group that enters the citric acid cycle, three molecules of NADH are produced.
Electrons are also transferred to the electron acceptor FAD, forming FADH2.
At the end of each cycle, the four-carbon oxaloacetate has been regenerated, and the cycle continues
10 NADH molecules and 2 FADH2 molecules.
The amount of energy released by any biomolecules is determined by how many ATP molecules are generated after the oxidation of that biomolecule, because the energy released during oxidation is saved in the form of ATP molecules. A glucose molecule on oxidation yields total 38 molecules of ATP that are formed after glycolysis, TCA Cycle and ETS. The number of carbon atoms in glucose is 6. Now consider a 6 Carbon Fatty acid molecule. It will undergo two beta oxidation cycles and will yield 3 Acetyl CoA molecules. Now, in each step of beta oxidation one NAD molecule is converted into NADH and H+ and one FAD molecule is reduced in FADH2. When these NADH and FADH2 molecules release their electrons in the Electron Transport Chain, they together cause the formation of 4 ATP molecules. Thus each step of beta oxidation will lead to formation of 4 ATP molecules. Thus if there are two steps of beta oxidation then there are 8 molecules of ATP. Now the three Acetyl CoA molecules formed also enter the TCA cycle and each cycle will lead to generation of 30 more ATP molecules. Thus, totally, 38 ATP molecules are formed. The number of ATPs formed, goes on increasing as the number of carbons in the fatty acid molecules is increased.
Hydrogen atoms released during biological oxidation are trapped by N.A.D+ and F.A.D. molecules. When N.A.D.H. is oxidized, you get 3 ATP molecules converted from 3 ADP molecules. In this process about 40 % energy is trapped and rest released in the form of heat.
In a chemical process, the molecules rearrange themselves. Energy is either released or absorbed. The process in a fire is called oxidation, where oxygen atoms combine with hydrogen and carbon to form waterand carbon dioxide. Oxidation is the same chemical process that turns iron into rust.
Resperation
There are two net molecules of ATP produced by substrate-level phosphorylation during glycolysis. (when one molecule of glucose is respired). Two are used to convert the glucose molecule to fructose, but four are released when pyruvate is made. However, the other products of glycolysis enable the Link Reaction, Krebs cycle and Oxidation Phosphorylation to happen, and these release a lot of ATP.
The amount of energy released by any biomolecules is determined by how many ATP molecules are generated after the oxidation of that biomolecule, because the energy released during oxidation is saved in the form of ATP molecules. A glucose molecule on oxidation yields total 38 molecules of ATP that are formed after glycolysis, TCA Cycle and ETS. The number of carbon atoms in glucose is 6. Now consider a 6 Carbon Fatty acid molecule. It will undergo two beta oxidation cycles and will yield 3 Acetyl CoA molecules. Now, in each step of beta oxidation one NAD molecule is converted into NADH and H+ and one FAD molecule is reduced in FADH2. When these NADH and FADH2 molecules release their electrons in the Electron Transport Chain, they together cause the formation of 4 ATP molecules. Thus each step of beta oxidation will lead to formation of 4 ATP molecules. Thus if there are two steps of beta oxidation then there are 8 molecules of ATP. Now the three Acetyl CoA molecules formed also enter the TCA cycle and each cycle will lead to generation of 30 more ATP molecules. Thus, totally, 38 ATP molecules are formed. The number of ATPs formed, goes on increasing as the number of carbons in the fatty acid molecules is increased.
Six oxygen molecules are released when one glucose molecule is formed.
Hydrogen atoms released during biological oxidation are trapped by N.A.D+ and F.A.D. molecules. When N.A.D.H. is oxidized, you get 3 ATP molecules converted from 3 ADP molecules. In this process about 40 % energy is trapped and rest released in the form of heat.
Carbon dioxide is released into the atmosphere
water
In a chemical process, the molecules rearrange themselves. Energy is either released or absorbed. The process in a fire is called oxidation, where oxygen atoms combine with hydrogen and carbon to form waterand carbon dioxide. Oxidation is the same chemical process that turns iron into rust.
Resperation
I think that it is Mitochondria...but im not sure. The first stages in the breakdown of glucose occur in the cytoplasm of the cell. These reactions do not use oxygen and only a small amount of energy is converted to ATP. Much more energy is released in the second stage which does take place in the mitochondria. This is the stage which uses oxygen.
It is called respiration.It take place in cytoplasm and mitochondria.
There are two net molecules of ATP produced by substrate-level phosphorylation during glycolysis. (when one molecule of glucose is respired). Two are used to convert the glucose molecule to fructose, but four are released when pyruvate is made. However, the other products of glycolysis enable the Link Reaction, Krebs cycle and Oxidation Phosphorylation to happen, and these release a lot of ATP.
There are two net molecules of ATP produced by substrate-level phosphorylation during glycolysis. (when one molecule of glucose is respired). Two are used to convert the glucose molecule to fructose, but four are released when pyruvate is made. However, the other products of glycolysis enable the Link Reaction, Krebs cycle and Oxidation Phosphorylation to happen, and these release a lot of ATP.
oxidation occurs when water is released through the digested system