Q7(a). Cytochrome P450 and its active oxidant
What is cytochrome P-450? How do you justify its name? State the oxidation state and spin state of the active metal centre present in the resting enzyme and any two important functions of P-450. During its enzymatic pathway, state the colour and origin of the colour of the radical cation intermediate, and the role of the axial thiolate ligand present in its structure. What do you understand by peroxide shunt in the activity of cyt P-450?
Model answer
The free solution for 2023 answers questions 1, 2, 4, 5 and 6, the ones picked in its time plan. Question 7 is answered in full in the IFoS Chemistry Paper I, 2021 to 2025 book, with every part of every paper.
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UPSC Indian Forest Service (Main) Chemistry Paper I: Model Answers 2021 to 2025
- All eight questions of each paper, with the question printed above its answer
- Physical chemistry numericals worked with units; inorganic structures drawn
- Topic-wise weightage and a topic-wise index
Coverscytochrome P450compound Iperoxide shuntthiolate ligandhaem monooxygenasehydroxylation
All parts of Question 7
- 7(a) Cytochrome P450 and its active oxidant15 marks
- 7(b) Structure of dimanganese decacarbonyl15 marks
- 7(c) Platinum–alkyne bonding10 marks