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Terminal cytochrome of respiratory chain which donates electrons to oxygen is [1992]
  • a)
    Cyt. b
  • b)
    Cyt. c
  • c)
    Cyt. a1
  • d)
    Cyt. a3
Correct answer is option 'D'. Can you explain this answer?
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Terminal cytochrome of respiratory chain which donates electrons to ox...
Terminal cytochorome is cyt a3. cyt a3 posseses two copper centers. It helps in transfer of electrons to oxygen.
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Terminal cytochrome of respiratory chain which donates electrons to ox...
Terminal Cytochrome of Respiratory ChainThe terminal cytochrome of the respiratory chain is the cytochrome that donates electrons to oxygen during the process of oxidative phosphorylation.Options:a) Cyt. bb) Cyt. cc) Cyt. a1d) Cyt. a3Correct Answer:d) Cyt. a3Explanation:The terminal cytochrome of the respiratory chain is responsible for transferring the electrons from the reduced cytochrome c to oxygen, which is the final electron acceptor in the electron transport chain. This process generates a proton gradient across the inner mitochondrial membrane, which is used to produce ATP.The terminal cytochrome is composed of two subunits, cytochrome a and cytochrome a3, which are associated with two copper ions. These copper ions are essential for the catalytic activity of the terminal cytochrome.The correct answer to the question is option d) Cyt. a3, as it is the subunit of the terminal cytochrome that donates electrons to oxygen.
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Terminal cytochrome of respiratory chain which donates electrons to ox...
Cytochrome a, helps in transfer of electron to oxygen. The oxygen has great affinity to accept the electrons and in presence of protons a water molecule is formed.
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