UPSC Civil Services (Mains), Chemistry optional · 2022 · Paper II
Q7(a). Secondary structures of proteins compared with tertiary structure
Question
Discuss the different types of secondary structures of proteins and compare these structures with tertiary structure of proteins.
Model answer
The free solution for 2022 answers questions 1, 4, 5, 6 and 8, the ones picked in its time plan. Question 7 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 secondary structureα-helixβ-pleated sheettertiary structurehydrogen bondingβ-turn
All parts of Question 7
- 7(a) Secondary structures of proteins compared with tertiary structure15 marks
- 7(b)(i) Butanoyl chloride with 2 NaBH₄, then H₃O⁺10 marks
- 7(b)(ii) But-2-yne with sodium in liquid ammonia5 marks
- 7(c)(i) Compound A (M = 102) and its cleavage products B and C10 marks
- 7(c)(ii) Three isomeric carbonyl compounds C₅H₁₀O10 marks