A) \[{{O}_{2}}\]
B) \[{{H}_{2}}\]
C) \[C{{O}_{2}}\]
D) NADH
Correct Answer: A
Solution :
Electron transport chain takes place in inner mitochondrial membrane and consist of flavins, ubiquinone cytochromes and oxygen as electron carriers. Sequence of electron transport: \[NAD{{H}_{2}}\xrightarrow{{}}FAD\xrightarrow{{}}Co-Q\xrightarrow{{}}\] \[Cytochrome-b\xrightarrow{{}}Cyt-{{c}_{1}}\xrightarrow{{}}Cyt-a\] \[\xrightarrow{{}}Cyt-{{a}_{3}}\xrightarrow{{}}{{O}_{2}}\] So, oxygen is the last electron acceptor in respiration.
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