Paper I — Q3
(a) Describe about the copper-molybdenum-sulphur inter-relationship in ruminants. (15 marks) (b) Write in detail about the…
(a) Describe about the copper-molybdenum-sulphur inter-relationship in ruminants. (15 marks) (b) Write in detail about the components of circulatory system in animals. (15 marks) (c) Explain about the feeding of breeding bulls. (10 marks) (d) Discuss about the use and abuse of antibiotics as feed additives in swine feeding. (10 marks)
हिंदी में प्रश्न पढ़ें
(a) जुगाली करने वाले जानवरों में ताँबा-मोलिब्डेनम-सल्फर के अंतःसंबंध के बारे में वर्णन कीजिए । (15 अंक) (b) जानवरों में परिसंचरण तंत्र के घटकों के बारे में विस्तार से लिखिए । (15 अंक) (c) प्रजनन करने वाले साँड़ों के आहार के बारे में व्याख्या कीजिए । (10 अंक) (d) सुअर के आहार में खाद्य योजक के रूप में एंटीबायोटिक दवाओं के उपयोग और दुरुपयोग के बारे में चर्चा कीजिए । (10 अंक)
Directive word: Describe
This question asks you to describe. 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 primary directive is 'describe' for part (a), with 'write in detail' for (b), 'explain' for (c), and 'discuss' for (d). Allocate approximately 35-40% time/words to part (a) given its 15 marks and biochemical complexity, 30% to part (b) for comprehensive anatomical coverage, 15% each to parts (c) and (d). Structure with brief contextual introductions for each sub-part, systematic body coverage, and concise syntheses—avoid lengthy conclusions for individual parts.
Key points expected
- Part (a): Thiomolybdate formation in rumen, Cu-Mo-S antagonism mechanism, role of sulphide in reducing copper absorption, thiomolybdate-copper complex formation, clinical manifestations (hypocuprosis, 'teart' in cattle), dietary ratios (Cu:Mo ideally 6:1 to 10:1), Indian conditions (fluorosis-prone areas affecting mineral balance)
- Part (b): Complete cardiovascular components—heart structure (four chambers, valves), systemic vs pulmonary circulation, blood composition (plasma, formed elements), lymphatic system (lymph nodes, vessels, spleen), comparative anatomy across species (avian vs mammalian differences)
- Part (c): Nutritional requirements for breeding bulls—energy-protein balance for libido and semen quality, mineral supplementation (Zn, Se for spermatogenesis), vitamin adequacy, body condition scoring (3.5-4.0 on 5-point scale), feeding during off-season vs breeding season
- Part (d): Therapeutic vs sub-therapeutic antibiotic use, growth promotion mechanisms (nutrient sparing, metabolic effects), antibiotic resistance development (MRSA, VRE), ban on AGPs in EU (2006) and Indian regulatory stance (FSSAI, ICAR guidelines), alternatives (probiotics, prebiotics, organic acids)
- Inter-part synthesis: Recognition that mineral inter-relationships (a), circulatory efficiency (b), and nutritional management (c-d) collectively determine reproductive and productive efficiency in livestock systems
Evaluation rubric
| Dimension | Weight | Max marks | Excellent | Average | Poor |
|---|---|---|---|---|---|
| Demand-directive understanding | 20% | 10 | Correctly interprets 'describe' for (a) as requiring mechanistic elaboration of biochemical interactions, not mere listing; 'write in detail' for (b) as comprehensive anatomical coverage; 'explain' for (c) as causal reasoning linking nutrition to reproductive outcomes; 'discuss' for (d) as balanced treatment of benefits and risks with evaluative stance | Addresses all parts but treats directives uniformly—either over-narrating where analysis is needed (d) or under-elaborating where description is required (a); minor confusion between 'explain' and 'discuss' | Misidentifies directives—treats (a) as simple enumeration, (b) as superficial listing, (d) as purely descriptive without critical evaluation; significant imbalance in effort allocation across parts |
| Content depth & accuracy | 20% | 10 | For (a): precise rumen biochemistry (tetrathiomolybdate formation, Cu-Mo-S stoichiometry, metallothionein role); for (b): accurate anatomical terminology (Purkinje fibers, semilunar valves, hepatic portal system); for (c): specific nutrient requirements (NRC standards adapted for Indian breeds); for (d): current regulatory frameworks (FSSAI, Codex Alimentarius) | Generally correct content with minor errors—e.g., imprecise thiomolybdate chemistry, incomplete lymphatic description, generic bull feeding without breed-specificity, dated antibiotic regulations | Substantial factual errors—e.g., confusing Cu-Mo antagonism with synergism, omitting pulmonary circulation, ignoring semen quality parameters in bull nutrition, conflating therapeutic and growth-promoting antibiotic use |
| Structure & flow | 20% | 10 | Clear four-part segmentation with visible demarcation; within each part, logical progression—(a) from rumen chemistry → absorption → clinical signs → management; (b) from heart → vessels → blood → lymph; (c) from requirements → practical ration formulation → seasonal adjustment; (d) from use → abuse → regulation → alternatives; effective signposting | All parts present but internal organization uneven—some parts well-structured (typically a or b) while others (c, d) become bullet-point lists without clear logical flow; adequate but not exemplary transitions | Poorly demarcated parts, merged responses, or missing sub-parts; chaotic internal organization with random fact placement; no visible structure within sub-parts; illegible or confusing presentation |
| Examples / case-law / data | 20% | 10 | For (a): Indian field conditions—teart pastures in Kodaikanal/Palani hills, copper supplementation protocols in NDRI studies; for (b): species-specific examples (avian nucleated erythrocytes, counter-current heat exchange in cetaceans); for (c): ICAR feeding standards for Murrah, Sahiwal, Gir bulls; for (d): EU Regulation 1831/2003, FSSAI 2017 guidelines, Indian antibiotic resistance surveillance data | Some relevant examples but limited Indian specificity—generic references to 'western countries' or outdated data; occasional irrelevance (e.g., non-ruminant mineral examples for part a) | No examples or data; purely theoretical treatment; incorrect or invented examples; examples from wrong contexts (human medicine for veterinary parts) |
| Conclusion & analytical edge | 20% | 10 | Brief but incisive syntheses per part—(a) emphasizes precision mineral balancing in intensive Indian dairying; (b) notes evolutionary adaptations in circulatory design; (c) links bull nutrition to national AI program success; (d) advocates for One Health approach to antibiotic stewardship; demonstrates systems-thinking across animal science disciplines | Formulaic conclusions restating main points without added insight; or strong conclusion for one part only with others trailing off; limited integration across the four sub-parts | No conclusions for individual parts or overall; abrupt endings; conclusions that contradict body content; purely descriptive closure without analytical or forward-looking element |
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