UPSC Civil Services (Main) Examination 2026 — Botany Optional Paper II: Question Paper | Plutus IAS

Home > UPSC  > UPSC Civil Services (Main) Examination 2026 — Botany Optional Paper II: Question Paper | Plutus IAS

09 Sep UPSC Civil Services (Main) Examination 2026 — Botany Optional Paper II: Question Paper | Plutus IAS

Posted at 09 Sep 2026 in UPSC by
0 Likes

The questions below are from Botany Optional Paper II of UPSC Civil Services (Main) Examination 2026 (held 2026-08-30) — the actual paper, which is public government content. This page carries the questions for reference and revision; model answers for this paper are not published here.

Official paper (PDF): upsc.gov.in.

  1. Write short notes on the following in about 150 words each : 10×5=50 (b) (d) (e)
  2. (a) Discuss on the tools and techniques involved in PCR and FISH. 20 (b) Explain the causes of Heterosis and its impact in Agriculture. 15 (c) Describe the various evidences supporting organic evolution. 15
  3. Write short notes on the following in about 150 words each : 10×5=50 (a) Munch hypothesis 10 (b) Correlation and Regression 10 (c) Heat Shock Proteins (HSP's) 10 (d) Biogeochemical cycle 10 (e) Regulation of NIF genes 10
  4. (a) Explain the significance of Nod factors and the process of root nodule formation. 10 (a) Describe the process of amino acid biosynthesis in nitrogen metabolism. 10 (b) Differentiate between photophosphorylation and oxidative phosphorylation. 15 (c) Discuss the biochemical and physiological changes during the process of fruit ripening. 15
  5. (a) Explain the factors affecting enzyme activity. 10 (a) Describe the mechanism of enzyme action. 10 (b) (b) (c)

Questions reproduced from the official paper for study purposes; verify on the exam-conducting body’s official website.

Related — other papers of this exam

Tushar
Latest posts by Tushar (see all)
No Comments

Post A Comment