What is the primary role of oxygen in cellular respiration

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Which of the following statements best describes the primary role played by oxygen in cellular respiration? 1.It serves as an acceptor for carbon, forming CO2 in the citric acid cycle. 2.It serves as the final acceptor for electrons from the electron transport chain. 3.It yields energy in the form of ATP as it is passed down the electron transport chain. 4.It oxidizes glucose to form two molecules of pyruvate.

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Answer:

The correct answer is 2- It serves as the final acceptor for electrons from the electron transport chain

Explanation:

The breakdown of glucose in the presence of oxygen to obtain the energy is called cellular respiration.

The breakdown of glucose is done by several steps such as glycolysis, Kreb's cycle, and electron transport chain system.

In an electron transport chain system, the electron is transported to the various electron carrier and finally transferred to the oxygen. Which is released out from the plant during the process called photosynthesis.

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