Where are the proteins of the electron transport chain located?
A) mitochondrial matrix B) mitochondrial inner membrane C) mitochondrial outer membrane D) mitochondrial intermembrane space
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Answer:
(B)
Explanation:
The electron transport chain is located in the mitochondria. There are five main protein complexes in the electron transport chain, located in the inner membrane of the mitochondria.
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The proteins of the electron transport chain are located in the mitochondrial inner membrane. (Option B)
- The mitochondria is a double membraned organelle in the cell which is the final site of metabolism for the production of energy in the form of ATP.
- At the end of the Citric Acid Cycle/TCA cycle in the mitochondrial matrix, six molecules of NADH and two FADH2 are produced. Totally, 6+2+2 NADH from glycolysis and TCA combined, and 2 FADH2 enter the etecton transport chain.
- Proteins in the ETC called cytochromes undergo redox reactions to convert the NADH and FADH2 molecules into ATP by maintaining a transmembrane proton gradient.
- At the end of the ETC, 38 ATP molecules are produced.
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