Why are NADH and FADH2 used as electron carriers? Where do they come from in cell and where do they go? When/where are they reduced and when/where are they oxidized? Which energy carrier provides more energy during cellular respiration and why? I just need the answer to the last question in bold

Question
Asked Oct 24, 2019
  • Why are NADH and FADH2 used as electron carriers? Where do they come from in cell and where do they go? When/where are they reduced and when/where are they oxidized? Which energy carrier provides more energy during cellular respiration and why?

 

I just need the answer to the last question in bold 

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Expert Answer

Step 1

Cellular respiration is the process of breaking down of complex food product into its individual components and producing ATP molecules using the energy released during the process. Usually, oxygen is used in the process and thus is known as aerobic respiration. The four stages included in the process of cellular respiration are: glycolysis, decarboxylation of pyruvate into acetyl coA, citric acid cycle and oxidative phosphorylation.

Step 2

The major electron carrier during the process of cellular reparation are FAD (flavin adenine dinucleotide) which gets reduced to FADH2 and NAD+ (nicotinamide adenine dinucleotide) which gets reduced to NADH. These two electron carriers transfer their electrons to enzymes of electron transport chain to produce ATP during the process of oxidative phosphorylation.

Among the two, NADH provides more energy as comp...

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