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Cell Respiration

Phophoralation

QuestionAnswer
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
Created by: Kristel