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In the electron transport chain, the coenzyme, ___, passes hydrogen and electrons to oxygen to form...

In the electron transport chain, the coenzyme, ___, passes hydrogen and electrons to oxygen to form water, which is essential to life. (B vitamin niacin, B vitamin thiamine, B vitamin biotin)

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Answer- In the electron transport chain, the coenzyme, B vitamin niacin , passes hydrogen and electrons to oxygen to form water, which is essential to life.

Explanation- B vitamin forms NADH( Nicotinamide Adenine Dinucleotide) which is involved in electron transport chain. It forms complex I i.e. NADH dehydrogenase in electron transport chain which in series through other complexes passes hydrogen and electrons to oxygen to form water, which is essential to life. other two vitamins- thiamine and biotin are not involved in electron transport chain. Their function is as follows-

  • B vitamin thiamine, coenzyme TPP( Thiamine Pyrophosphate), is used in the metabolism of branched- chain amino acids and carbohydrates.
  • B vitamin biotin, coenzyme, is used in carboxylation reactions.
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