Paper I — Q3
(a) Mention the general functions of minerals in animals. Justify the importance of Vitamin D in optimum calcium and phosphorus…
(a) Mention the general functions of minerals in animals. Justify the importance of Vitamin D in optimum calcium and phosphorus nutrition in animals. (10+10=20 marks) (b) Discuss the physiological functions of plasma proteins in animals. (15 marks) (c) Suggest the feeding and management of animals under flood-affected conditions. (15 marks)
हिंदी में प्रश्न पढ़ें
(a) पशुओं में खनिजों के सामान्य कार्यों का उल्लेख कीजिए । पशुओं में इष्टतम कैल्शियम और फॉस्फोरस पोषण में विटामिन डी के महत्व का औचित्य सिद्ध कीजिए । (10+10=20) (b) पशुओं में प्लाज्मा प्रोटीनों के शारीरक्रियात्मक कार्यों की चर्चा कीजिए । (15) (c) बाढ़-प्रभावित परिस्थितियों में पशुओं के आहार और प्रबंधन पर सुझाव दीजिए । (15)
Directive word: Justify
This question asks you to justify. The directive word signals the depth of analysis expected, the structure of your answer, and the weight of evidence you must bring.
See our UPSC directive words guide for a full breakdown of how to respond to each command word.
How this answer will be evaluated
Approach
The directive 'justify' in part (a) demands evidence-based reasoning with mechanistic explanations, while 'discuss' in (b) requires comprehensive coverage, and 'suggest' in (c) calls for practical, actionable recommendations. Allocate approximately 40% time/words to part (a) given its 20 marks, with ~30% each to parts (b) and (c). Structure with a brief integrated introduction, three clearly demarcated sections for each sub-part, and a concluding synthesis on nutritional-physiological integration under stress.
Key points expected
- Part (a): Six general functions of minerals (structural, catalytic, osmotic, acid-base balance, nerve transmission, muscle contraction) with at least one specific mineral example per function
- Part (a): Vitamin D activation pathway (UV-7-dehydrocholesterol → cholecalciferol → 25-OH-D3 in liver → 1,25-(OH)2-D3 in kidney) and its hormonal regulation by PTH and calcitonin
- Part (a): Mechanistic justification: Vitamin D-induced calbindin-D synthesis for intestinal Ca absorption, renal phosphate reabsorption, and bone mineralization mobilization balance
- Part (b): Six major plasma protein fractions (albumin, α1-globulin, α2-globulin, β-globulin, γ-globulin, fibrinogen) with specific physiological functions for each
- Part (b): Oncotic pressure maintenance, transport functions (hormones, fatty acids, bilirubin, Ca2+), immune defense, clotting cascade, and acid-base buffering capacity
- Part (c): Immediate flood response (evacuation, elevated platforms, feed/water preservation), short-term feeding strategies (silage, urea-molasses blocks, vitamin-mineral supplementation), disease prevention (foot rot, pneumonia, enteritis), and post-flood rehabilitation protocols
Evaluation rubric
| Dimension | Weight | Max marks | Excellent | Average | Poor |
|---|---|---|---|---|---|
| Demand-directive understanding | 20% | 10 | For (a), provides mechanistic justification with biochemical pathways rather than mere listing; for (b), 'discuss' is fulfilled with interlinked functional analysis, not isolated descriptions; for (c), 'suggest' delivers prioritized, phased actionable protocols with clear rationale for each recommendation | Addresses all three directives superficially—lists functions for (a), describes proteins for (b), and gives generic advice for (c) without prioritization or mechanistic depth | Misinterprets directives—describes instead of justifies for (a), lists instead of discusses for (b), or merely narrates flood effects instead of suggesting management for (c) |
| Content depth & accuracy | 20% | 10 | Demonstrates command of molecular mechanisms (VDR-RXR binding for vitamin D; albumin's role in calcium transport and drug binding kinetics); cites specific plasma protein values (normal ranges, A:G ratio); includes species-specific variations (ruminant vs. monogastric mineral metabolism) | Covers standard textbook content with minor inaccuracies (e.g., conflates vitamin D2 and D3 sources; omits fibrinogen in plasma protein classification); presents generic flood management without species differentiation | Contains significant factual errors (e.g., states vitamin D is synthesized in kidney; confuses plasma proteins with serum proteins; recommends normal feeding post-flood without accounting for mycotoxin risks) |
| Structure & flow | 20% | 10 | Clear tripartite structure with explicit sub-headings; logical progression within each part—(a) from general functions to specific vitamin D mechanism, (b) from classification to integrated functions, (c) from immediate to recovery phases; smooth transitions between parts showing nutritional-physiological integration | Identifiable parts but uneven development—excessive detail in one section at expense of others; some logical gaps (e.g., jumps from vitamin D to flood management without connecting physiological stress) | Poorly organized with mixed content across parts; no clear demarcation between (a), (b), and (c); rambling narrative without paragraph breaks or logical sequencing |
| Examples / case-law / data | 20% | 10 | Cites Indian research (e.g., NDRI studies on vitamin D in dairy cattle; IVRI work on flood management in Bihar/Assam); references specific flood events (2013 Uttarakhand, 2018 Kerala) with mortality/production loss data; includes quantitative parameters (Ca:P ratio 1.5-2:1; plasma albumin 3.5-5.5 g/dL in cattle) | Mentions generic examples without specificity (e.g., 'dairy cows in India' without breed or region; 'floods in eastern states' without naming); includes some numerical values but without context or source | No Indian examples or data; relies entirely on foreign literature; or provides incorrect/invented statistics without basis |
| Conclusion & analytical edge | 20% | 10 | Synthesizes how mineral-vitamin D-plasma protein axis maintains homeostasis under stress; critically evaluates limitations (e.g., vitamin D toxicity vs. deficiency in confined vs. pastured animals); proposes research gaps or policy recommendations (NDDB's role in flood preparedness, precision mineral supplementation) | Summarizes main points without synthesis; standard concluding paragraph restating content; no critical evaluation or forward-looking recommendations | Abrupt ending with no conclusion; or introduces entirely new content in conclusion; or makes unsupported claims contradicting earlier content |
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