LABORATORY REVIEW
CELL RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2 electrons, 3 protons
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1 electron, 1 proton
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2 electrons, 1 proton
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3 protons, 2 electrons
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Detailed explanation-1: -The citric acid cycle is a series of chemical reactions that removes high-energy electrons and uses them in the electron transport chain to generate ATP. One molecule of ATP (or an equivalent) is produced per each turn of the cycle.
Detailed explanation-2: -The process of forming ATP from the electron transport chain is known as oxidative phosphorylation. Electrons carried by NADH + H+ and FADH2 are transferred to oxygen via a series of electron carriers, and ATPs are formed. Three ATPs are formed from each NADH + H+, and two ATPs are formed for each FADH2 in eukaryotes.
Detailed explanation-3: -FAD is the oxidized (quinone) form, which is reduced to FADH2 (hydroquinone form) by accepting two electrons and two protons.
Detailed explanation-4: -The electron carriers become oxidized as they donate electrons and reduced as they accept them, and thus alternate between their oxidized and reduced forms. Electron carriers provide a controlled flow of electrons that enables the production of ATP. Without them, the cell would cease to function.