CSS past papers · 2025
CSS 2025 Zoology Past Paper
Download and review the CSS 2025 Zoology Past Paper on CSS Vista, with archive details, related papers and a direct PDF link for examination preparation.
Paper details
- Examination
- CSS
- Year
- 2025
- Subject
- Zoology
- Paper
- Single Paper
- Subject type
- Optional
- Mode
- Subjective
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Questions recorded from this paper
These 7 question wordings are transcribed from CSS Vista’s structured Zoology past-paper record for CSS 2025.
- Q6 · Protozoa of veterinary and medical importanceDiscuss the economic and medical importance of ticks and mites of order Acari (20) to human well-being.
- Q7 · Birds: Migration and navigation, adaptationsWhat are the advantages of migration of birds? What are the major migratory (20) routes of birds? How birds navigate?
- Q2 · Enzymes function and factors affecting their activity, cofactors and coenzymesDifferentiate between enzymes, co-enzymes, and co-factors in a biological cell. (20) Describe with a flow chart which enzymes/co-enzymes take part in glycolysis and Kreb’s Cycle.
- Q4 · Animal Form and FunctionExplain with diagrams the structure, synthesis, and functions of thyroid (20) hormones. Describe hypo-and-hyper-thyroidism in detail.
- Q5 · Composition of bloodDifferentiate between blood, plasma, and serum. Explain the various types and (20) sub-types of blood cells in mammals. What is immunity? Explain the roles of different types of lymphocytes in immunity.
- Q8 · Vertebrate endocrine glands and types of hormones, Mechanism of hormones actionWrite short notes on any TWO of the following: (10 each) (20) a. Mechanism of action of protein hormones b. Leishmaniasis in human c. Types of feathers in birds
- Q3 · Integrated / Cross-Syllabus QuestionsExplain the transcription and processing of mRNA in the nucleus. Describe in (20) detail the roles of mRNA, tRNA, and rRNA in polypeptide synthesis.