DENDROLOGY

TREE PHYSIOLOGY

RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The primary role of oxygen in cellular respiration is to
A
yield energy in the form of ATP as it is passed down the respiratory chain
B
act as an acceptor for electrons and hydrogen, forming water.
C
combine with carbon, forming CO2
D
combine with lactate, forming pyruv ate
Explanation: 

Detailed explanation-1: -It serves as the final electron acceptor of the electron transport chain facilitating the movement of electrons down the chain hence producing the ATP or adenosine triphosphate. Oxygen combines with the electrons and the hydrogen ions to form water which is a byproduct of the process.

Detailed explanation-2: -Oxygen is the final electron acceptor in this respiratory cascade, and its reduction to water is used as a vehicle by which to clear the mitochondrial chain of low-energy, spent electrons. The enzyme that catalyzes this process, cytochrome oxidase, spans the mitochondrial membrane.

Detailed explanation-3: -Oxygen is the terminal electron acceptor in the mitochondrial electron transport chain and therefore is required for the generation of energy through oxidative phosphorylation.

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