A) \[{{O}_{2}}\]
B) \[{{H}_{2}}\]
C) \[C{{O}_{2}}\]
D) \[NADH\]
Correct Answer: A
Solution :
Electron transport chain takes place in inner milochondrial membrane and consist of flavins, ubiquinone cytochromes and oxygen as electron carriers. Sequence of electron transport: \[NAD2H\xrightarrow[{}]{{}}FAD\xrightarrow[{}]{{}}CoQ\xrightarrow[{}]{{}}\] \[Cytochrome-b\xrightarrow[{}]{{}}Cyt-{{c}_{1}}\xrightarrow[{}]{{}}Cyt-a\] \[\xrightarrow[{}]{{}}Cyt-{{a}_{3}}\xrightarrow[{}]{{}}{{O}_{2}}\] So, oxygen is the last electron acceptor in respiration.
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