Biochem Exam 3 Lecture 1 MCPHS
Exam Study Guide with Complete
Solutions
What is the final stage of cellular respiration and where does it happen - Answer✔️✔️-
Oxidative phosphorylation, in the mitochondria
What does oxidative phosphorylation couple - Answer✔️✔️-The oxidation of NADH or
FADH2 to the reduction of O2 to get H2O and formation of ATP
Where in the mitochondria are the components of the respiratory chain - Answer✔️✔️-
Inner membrane
Briefly summarize the process of the respiratory chain - Answer✔️✔️-1. Electrons flow
through a chain of membrane-bound carriers
2. This results in protons (H+) pumped from matrix to inter membrane space
3. H+ gradient drives ATP synthesis
Electrons are transferred from a substrate to which universal electron acceptors -
Answer✔️✔️-NAD+, NADP+, FAD, FMN
NAD+ or NADP+ accepts what and releases what, how many electrons at once -
Answer✔️✔️-Accepts H- (H+ and 2 electrons), picks up a pair of electrons at once,
releases a proton
How many electrons can FAD or FMN accept and transfer at a time - Answer✔️✔️-One
or two electrons AT A TIME
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