Concept explainers
Introduction :
The electron transport system is the terminal step of aerobic respiration that operates on the inner membrane of the mitochondria. During electron transport, high-energy electrons are released from NADH and FADH2to produce energy in the form of ATP. Oxygen is the final electron acceptor in the electron transport system in
Answer to Problem 36A
Correct answer :
The correct answer is option (A) H2O.
Explanation of Solution
Explanation/justification for the correct answer :
Option (A) H2O (water). At the end of the electron transport system, two protons, two electrons, and half of an oxygen molecule combine to form H2O( water). Thus, the correct answer is an option (A).
The explanation for the incorrect answer :
Option (B) O2 (oxygen). Free oxygen as the final electron acceptor of the electrons which are removed from the intermediate compounds NADH and FADH2 .Thus, this is an incorrect option.
Option (C) CO2. CO2 (carbon dioxide) is not produced when the electrons leave the electron transport chain in cellular respiration. It is not a part of electron transport chain. Thus, this is an incorrect answer.
Option (D) CO. CO (carbon monoxide) is not produced when the electrons leave the electron transport chain in cellular respiration. It is not a part of electron transport chain. Thus, this is an incorrect answer.
Chapter 8 Solutions
Biology Illinois Edition (Glencoe Science)
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