Cellular Respiration 3
Storyboard Text
- How many ATP are produced during the Krebs cycle?
- From what you are telling me, I understand that there are 2 ATP produced during the Glycolysis, correct?
- There are 2 ATP produced during the Glycolysis and 2 ATP produced during the Krebs cycles as well.
- Correct!
- Let's keep talking about the Krebs cycle on the way to my house.
- What happens during the Krebs cycle?
- During the Krebs Cycle pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions. It starts with pyruvic acid produced by glycolysis which passes through the 2 membranes of the mitochondrion and into the matrix
- Matrix is the innermost compartment of themitochondrion. 1 carbon atom from pyruvic acid is split off and that's how CO2 is produced which get released in the air. The other 2 carbon atoms rearrange to form acetic acid that joins to coenzyme A and the resulting molecule is acetyl-CoA which hands off the 2-carbon acetyl group to a 4-carbon molecule that is present thus producing a 6-carbon molecule known as citric acid.
- How is the energy extracted?
- 2 molecules of CO2 are removed from citric acid and 4 are left. This molecule produced in the last step is the the same molecule that accepts the acetyl-CoA and is needed to start the cycle again.
- I'd like to join in and tell you about the electron carries NAD+ and FAD. At 5 places in each Krebs cycle, they accept a pair of high-energy electrons and a H ion and turn into NADH and FADH2. In the presence of oxygen, the electrons they hold are used to generate huge amounts of ATP.
- For each turn of the cycle, a molecule of ADP is converted into a molecule of ATP. So each starting molecule of glucose results in 2 turns of the Krebs cycle thus 2 ATP are being produced.
Over 30 Million Storyboards Created