Q7(b). Cytochrome b, cytochrome c and cytochrome c oxidase
What is the basic difference between Cytochrome ‘b’ and Cytochrome ‘c’? Explain the role of Cytochrome ‘c’ oxidase.
Answer in brief
Cytochrome b haem is held only by coordination; cytochrome c haem is also bound covalently by two cysteine thioether links. Cytochrome c oxidase takes electrons from cytochrome c and reduces O₂ to water.
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Coverscytochrome ccytochrome bcytochrome c oxidaseelectron transport chainhaem proteinsbioinorganic chemistry
All parts of Question 7
- 7(a) T and R forms of haemoglobin15 marks
- 7(b) Cytochrome b, cytochrome c and cytochrome c oxidase5 marks
- 7(c) Stereoisomers of a doubly bridged dicobalt complex10 marks
- 7(d) Second-order rate law with unequal concentrations; units of k10 marks
- 7(e) Substitution in [PtCl₃(C₂H₄)]⁻ and the trans effect10 marks