How many turns krebs cycle
After the second turn through the Krebs cycle, the original glucose molecule has been broken down completely. All six of its carbon atoms have combined with oxygen to form carbon dioxide. The energy from its chemical bonds has been stored in a total of 16 energy-carrier molecules.
These molecules are:. Results of the Krebs Cycle After the second turn through the Krebs cycle, the original glucose molecule has been broken down completely. Summary The Krebs cycle is the second stage of cellular respiration.
Explore More Use this resource to answer the questions that follow. The Citric Acid Cycle at virtuallabs. Where does the Krebs cycle occur in the cell? What is the first product of this cycle? How many reactions does it take to complete the cycle? Two acetyl-CoA molecules enter the cycle, and each has two carbon atoms, so four carbon dioxide molecules will form. Add these four molecules to the two carbon dioxide molecules formed in the conversion of pyruvic acid to acetyl-CoA, and it adds up to six carbon dioxide molecules.
These six CO 2 molecules are given off as waste gas in the Krebs cycle. They represent the six carbons of glucose that originally entered the process of glycolysis. At the end of the Krebs cycle, the final product is oxaloacetic acid. This is identical to the oxaloacetic acid that begins the cycle. Now the molecule is ready to accept another acetyl-CoA molecule to begin another turn of the cycle. Previous Quiz Glycolysis. Next Quiz Krebs Cycle. Removing book from your Reading List will also remove any bookmarked pages associated with this title.
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