Can anyone help me with biology?

L

Liz

New member
What are the similarities/differences between the processes of chemiosmosis and substrate-level phosphorylation in regards to the production of ATP ?

To me, they seem like a completely different thing. Chemiosmosis uses energy(ATP) to pump proteins and substrate-level phosphorylation results in the creation of ATP. However, I feel like I'm missing the big picture here or something.
 
he actual production of ATP in cellular respiration takes place through the process of chemiosmosis. Chemiosmosis involves the pumping of protons through special channels in the membranes of mitochondria from the inner to the outer compartment. The pumping establishes a proton gradient. After the gradient is established, protons pass down the gradient through particles designated F1. In these particles, the energy of the protons generates ATP, using ADP and phosphate ions as the starting points.
Look at this animation: http://www.youtube.com/watch?v=Idy2XAlZIVA

Substrate-level phosphorylation is the production of ATP from ADP by a direct transfer of a high-energy phosphate group from a phosphorylated intermediate metabolic compound in an exergonic catabolic pathway.
 
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