TREE PHYSIOLOGY
RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is a nucleotide source for ATP synthesis.
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It functions as an electron carrier.
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It functions as an enzyme
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It is the final electron acceptor for anaerobic respiration.
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Detailed explanation-1: -It is an electron carrier used to temporarily store energy during cellular respiration. This is found in two forms in cells: NAD+ is an oxidizing agent – it accepts electrons from other molecules and becomes reduced. This reaction forms NADH, which can then be used as a reducing agent to donate electrons.
Detailed explanation-2: -During cellular respiration, two molecules called nicotinamide adenine dinucleotide (NAD+) and flavin adenine dinucleotide (FAD) act as electron carriers.
Detailed explanation-3: -One role of NAD+ is to initiate the electron transport chain by the reaction with an organic metabolite (intermediate in metabolic reactions) . This is an oxidation reaction where 2 hydrogen atoms (or 2 hydrogen ions and 2 electrons) are removed from the organic metabolite.
Detailed explanation-4: -NADH: High energy electron carrier used to transport electrons generated in Glycolysis and Krebs Cycle to the Electron Transport Chain. FADH2: High energy electron carrier used to transport electrons generated in Glycolysis and Krebs Cycle to the Electron Transport Chain.