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Cell Respiration
Phophoralation
Question | Answer |
---|---|
What are the 2 types of Catabolic Reactions which yield ATP? | 1. Substrate Phosphorylation 2. Oxidative Phosphorylation |
What is Substrate Phosphorylation? | DIRECT ATP formation - w/o O2 |
How does Substrate Phosphorylation make ATP? | by removing a PO4 from Substrate + ADP = ATP - 1 step |
Where does Substrate Phosphorylation occur? | throughout the Cytoplasm |
What is Oxidative Phosphorylation? | INDIRECT ATP formation |
How does Oxidative Phosphorylation work? | Coenzymes NAD and FAD accept H+ from substrates --> pass electrons through ETS - 2 step |
Where does Oxidative Phosphorylation take place? | concludes in the Mitochondria |
What role does O2 play in Oxidative Phosphorylation? | final e- (H+) acceptor |
What are Cyotchromes? | small, Iron-containing Proteins |
Where are Cytochomes located? | arranged side-by-side along the INNER Mitochondrial Membrane |
How many Cytochromes does the average cell have? | some 24, some 12, some 0 - depending on cell's need/ability to produce ATP |
What are 2 differenced between NAD and FAD? | NAD: yields 3 ATP, accepts 2 H+; FAD yields 2 ATP, accepts H Atoms |
What would happen if there were no O2 at the end of ETS? | entire process would back up --> no ATP --> death |
How many electrons can each Cytochorme hold at 1 time? | 1 - they play "hot potato" |
How do NAD and FAD move into/out of the ETS? | Passive Diffusion: HIGH --> LOW |