Biological Oxidation Question And Answers

Biological Oxidation

Write briefly about the electron transport chain
Answer:

• The electron transport chain is also called the respiratory chain
• It occurs in the inner mitochondrial membrane
• It produces ATP via oxidative phosphorylation of ADP

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• It reoxidizes NADH & FADH2 back to NAD+ FAD
• Electrons flow through a series of four Cytochrome complexes of increasing redox potential
• Cytochrome contains a central iron atom which can exist in an oxidized ferric state or reduced ferrous state
• Cytochromes carry electrons as flavins, Iron-sulfur groups, hemes & copper ions

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Components of electron transport chain:

• There are five distinct carriers that participate in the electron transport chain
• They are
  1. Nicotinamide nucleotides
  2. Flavoproteins
  3. Iron-sulfur proteins
  4. Coenzyme Q
  5. Cytochromes