6. In a recent lab you performed an experiment in which a mitochondrial preparat

Question

6. In a recent lab you performed an experiment in which a mitochondrial preparation was added to a reaction cuvette that contained a buffered solution of cytochrome c (cyt c Your instructor told the class that you were studying the last step of oxidative phosphorylation. What equation (below) represents the reaction that you were monitoring? Recall that cyt Cox represents oxidized cyt c and cyt Cred indicates the reduced form of cyt c. a) cyt coxidized + glucose cyt creduced + CO2 b) cyt aed + O2 = cyt ax + H2O c) cyt Cox Hcyt Cred + H2

Explanation / Answer

Option b is correct. Oxidative phosphosphorylation is a process in which energy released from electron transport chain is used to syntheisize ATP by using ADP through the enzyme ATP synthase. The last step of oxidative phosphorylation involves the receiving of electrons by oxygen (acts as final acceptor of electrons) from reduced form of cytochrom c (Cyt Cred). The oxygen molecules converts into water molecule after accepting electron.

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