Find the PMS Botany Past Paper-II 2025. Provincial Management Services (PMS) is a competitive examination conducted by PPSC. The PMS Botany Paper-II was held on May 10, 2026. Find the past paper below to understand what it is about and what type of questions were given.
PMS Botany Paper-II 2025
Q. No. 1: a) What do you understand by crop rotation? How can it help maintain the balance of nitrogen in the soil?
b) Write down the role of gibberellins in plant growth.
c) Define nitrogen fixation. How does it take place in nature?
Q. No. 2: a) How is pyruvic acid converted into carbon dioxide? Explain with the help of the Krebs cycle.
b) Differentiate between alcoholic and lactic acid fermentation.
c) Briefly explain oxidative phosphorylation.
Q. No. 3: Define soil erosion. Discuss in brief the various biological and mechanical methods of soil conservation. Discuss in detail the effects of air pollution on the atmosphere, vegetation, and human health.
Q. No. 5: a) Name different types of models of the structure of biological membranes. Describe the fluid-mosaic model in detail.
b) Write a note on mitochondria.
Q. No. 6: Compare the following:
- (i) Transcription and translation
- (ii) Transduction and transformation
- (iii) DNA and RNA
- (iv) Monohybrid cross and dihybrid cross (5×4=20 Marks)
Q. No. 7: How did Meselson & Stahl prove the semi-conservative model of DNA replication?
Q. No. 8: a) What does the Hardy-Weinberg law state? Describe its main assumptions.
b) What are the main causes of changes in gene frequencies?
