Cellular Respiration: Electron Transport Chain Ch. 9. Ms. Springstroh AP Biology Adapted from Ms. Gaynor-Day and Mr. Grant. What’s the point?. The point is to make ATP !. ATP. ATP accounting so far…. Glycolysis 2 ATP Kreb’s cycle 2 ATP
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Cellular Respiration: Electron Transport ChainCh. 9
Adapted from Ms. Gaynor-Day and Mr. Grant
The pointis to makeATP!
There’s got to be a better way!
I need a lotmore ATP!
A working muscle recycles over 10 million ATPs per second
**OCUURS IN CRISTAE
(folds of inner membrane)
Oooooh!Form fits function!
Oxidative phosphorylation: generates ATP when electrons are taken from NADH or FADH2 (which become oxidized) and go down the electron transport chain. This causes Pi (inorganic phosphate) to join with ADP to form ATP.
Substrate-level phosphorylation: generates ATP when an enzyme takes a phosphate from a substrate molecule and gives it directly to ADP.
**NEEDS O2 TO PROCEED
What happens at the end of the ETC chain?
= high [H+]
2 H+ + 1/2 O2
ATP synthesis powered by the flow
Of H+ back across the membrane
Electron transport chain
Electron transport and pumping of protons (H+),
which create an H+ gradient across the membrane
+ 2 ATP
+ about 32 or 34 ATP
36 or 38 ATP
+ 2 ATP
We will cover the following two slides when we learn about photosynthesis, but you can preview them now if you want. You’ll probably understand most of them!