Cyanide is the only reagent added to the system that is not a part of the balanc
ID: 88443 • Letter: C
Question
Cyanide is the only reagent added to the system that is not a part of the balanced equation for the reaction. What was the purpose of adding cyanide to the system? What result would you expect if the cyanide had not been added? Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Terms can be used once, more than once, or not at all.
H2O
donor
H+
cytochrome c
acceptor
cytochrome c oxidase
NADH-coenzyme Q oxidoreductase
-hydroxybutyrate
OH
coenzyme Q-cytochrome c oxidoreductase
O2
-ketobutyrate
Cyanide is a potent inhibitor of _____ . It is present to ensure that the electrons picked up by _____ are not passed on down the system to ______ , which is the ______ when the whole electron transport system is operative. In the absence of cyanide, the electrons from ______ would be transferred all the way to ________ , which would defeat the purpose of the experiment.
Explanation / Answer
Answer: Cyanide is a potent inhibitor of cytochrome c oxidase. It is present to ensure that the electrons picked up by cytochrome c are not passed on down the system to O2 , which is the acceptor when the whole electron transport system is operative. In the absence of cyanide, the electrons from -hydroxybutyrate would be transferred all the way to O2 , which would defeat the purpose of the experiment.
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