Electron transport system: The electron transmitter system is also called an electron transport chain (ETC), or the cytochrome system, as four out of these seven carriers are cytochrome. It is the major source of cell energy, in the respiratory breakdown of simple carbohydrates intermediates like phosphoglyceraldehyde, pyruvic acid, isocitric acid, ketoglutaric acid, succinic acid and malic acid are oxidized.\n\n
The oxidation in all these brought about by the removal of a pair of hydrogen atoms (2H) from each of them. This final stage of respiration is carried out in ETS, located in the inner membrane of mitochondria (in prokaryotes the ETS is located in mesosomes of plasma membrane). The system consists of a series of precisely arranged seven electron carriers (coenzyme) in the inner membrane of the mitochondrion, including the folds or cristae of this membrane.
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These seven electron-carriers function in a specific sequence and are nicotinamide adenine dinucleotide, Flavin mononucleotide (FMN), Flavin adenine dinucleotide, Co-enzyme-Q or ubiquinone, Cytochrome-b, Cytochrome-c, Cytochrome-a and Cytochrome-a3. The complexes formed are as follows:
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Components of ETS
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Name of complexes
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FMN-NADH2 dehydrogenase
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Complex - I
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FADH2 dehydrogenase/ Succinate dehydrogenase
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Complex - II
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\n\t\t
\n\t\t\t
cyt b and cyt c1
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Complex - III
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\n\t\t
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cyt a and cyt a3 with two copper centers
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Complex - IV
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ATP synthetase
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Complex - V
\n\t\t
\n\t\n
\n\n"},"encodingFormat":"text/html","position":1,"text":"Cytochrome a-a3 complex"},"comment":{"@type":"Comment","text":"It is the last cytochrome complex during ETC."},"eduQuestionType":"Multiple choice","encodingFormat":"text/markdown","learningResourceType":"Practice problem","suggestedAnswer":[{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":0,"text":"Succinate dehydrogenase"},{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":2,"text":"Cytochrome bc complex"},{"@type":"Answer","comment":{"@type":"Comment","text":"It is a wrong option."},"encodingFormat":"text/html","position":3,"text":"Cytochrome reductase complex"}],"text":"The complex of ETS which has two copper centres associated with it is:"},"name":"Quiz on Respiration in Plants","typicalAgeRange":"10-17","url":"https://www.embibe.com/questions/The-complex-of-ETS-which-has-two-copper-centres-associated-with-it-is%3A/EM4847917"}
A Team of Subject Experts Solutions for Exercise 1: TOPICWISE QUESTIONS
Author:A Team of Subject Experts
A Team of Subject Experts Biology Solutions for Exercise - A Team of Subject Experts Solutions for Exercise 1: TOPICWISE QUESTIONS
Attempt the practice questions from Exercise 1: TOPICWISE QUESTIONS with hints and solutions to strengthen your understanding. Daily Practice Problems (DPP) Unit III : Cell: Structure and Functions Unit IV : Plant Physiology NEET solutions are prepared by Experienced Embibe Experts.
Questions from A Team of Subject Experts Solutions for Exercise 1: TOPICWISE QUESTIONS with Hints & Solutions