UPSC Civil Services (Mains), Chemistry optional · 2021 · Paper II
Q6(b). Interactions that stabilise a protein, with the residues involved
Question
Show salt bridge, hydrogen bond, van der Waals' interaction and disulfide bridge for stabilisation of a protein by choosing appropriate amino acid residues in the protein chain.
Model answer
The free solution for 2021 answers questions 1, 2, 3, 5 and 8, the ones picked in its time plan. Question 6 is answered in full in the Chemistry Paper II, 2021 to 2025 book, with every part of every paper.
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UPSC Civil Services (Main) Chemistry Paper II: Model Answers 2021 to 2025
- All eight questions of each paper, with the question printed above its answer
- Mechanisms drawn out and labelled on the scheme
- Topic-wise weightage and a topic-wise index
Coversprotein tertiary structuresalt bridgedisulfide bridgehydrogen bondvan der Waals interactioncysteine
All parts of Question 6
- 6(a)(i) Product of acetone with dilute sodium hydroxide from its spectra15 marks
- 6(a)(ii) Higher carbonyl stretching frequency in two pairs5 marks
- 6(b) Interactions that stabilise a protein, with the residues involved15 marks
- 6(c) I Photolysis of 2-cyclopropylcyclohexanone5 marks
- 6(c) II Photolysis of 1,1,3-triphenylpropan-2-one10 marks