Paper II — Q8
(a) Classify diuretics with examples on the basis of efficacy and also write down their mechanism of action. (20 marks) (b)…
(a) Classify diuretics with examples on the basis of efficacy and also write down their mechanism of action. (20 marks) (b) Discuss in detail about the processing of butter along with flow diagram. Enumerate the defects encountered in stored butter. (20 marks) (c) Explain the antimicrobial components of shell eggs and discuss the different types of microbial spoilage of shell eggs. (10 marks)
हिंदी में प्रश्न पढ़ें
(a) प्रभावोत्पादकता (एफिकेसी) के आधार पर मूत्रवर्धकों को उदाहरण सहित वर्गीकृत कीजिए तथा उनकी क्रियाविधि भी लिखिए। (20 अंक) (b) मक्खन के प्रसंस्करण के बारे में प्रवाह आरेख (फ्लो डायग्राम) के साथ विस्तार से चर्चा कीजिए। भंडारित मक्खन में आने वाली खराबियों के बारे में लिखिए। (20 अंक) (c) शेल अंडों के रोगाणुरोधी घटकों (कॉम्पोनेंट) की व्याख्या कीजिए एवं शेल अंडों की विभिन्न प्रकार की माइक्रोबियल खराबी (स्पॉइलेज) की चर्चा कीजिए। (10 अंक)
Directive word: Discuss
This question asks you to discuss. 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 question demands a comprehensive discussion across three distinct domains: pharmacology (diuretics), dairy technology (butter processing), and food microbiology (egg spoilage). Allocate approximately 40% of time/words to part (a) given its 20 marks and technical depth, 35% to part (b) for the detailed process flow and defects, and 25% to part (c). Structure with clear sub-headings for each part, begin with brief introductions, use bullet points for classifications and mechanisms, include labeled diagrams for butter processing, and conclude with integrated insights on food safety and quality control across animal products.
Key points expected
- Part (a): Classification of diuretics by efficacy (high-ceiling loop diuretics like furosemide, medium-ceiling thiazides like hydrochlorothiazide, low-ceiling potassium-sparing like spironolactone) with specific mechanism of action for each class (Na-K-2Cl cotransporter, Na-Cl cotransporter, aldosterone antagonism/ENaC blockade respectively)
- Part (a): Clinical relevance and comparative pharmacokinetics of diuretic classes in veterinary species (cattle, dogs, horses)
- Part (b): Complete butter processing flow: cream separation → neutralization (if needed) → pasteurization → aging/churning → washing → working/salting → packaging, with proper flow diagram
- Part (b): Storage defects: surface discoloration (oxidative rancidity, microbial), texture defects (crumbly, greasy, leaky), flavor defects (fishy, tallowy, metallic) and their causative factors
- Part (c): Antimicrobial components: cuticle, shell matrix proteins (ovocalyxin-36, lysozyme), shell mineral structure, albumen antimicrobial factors (lysozyme, ovotransferrin, avidin, ovomucoid)
- Part (c): Microbial spoilage types: green rot (Pseudomonas), black rot (Proteus, Pseudomonas), colorless rot (Alcaligenes, Achromobacter), pink rot (Pseudomonas), and fungal spoilage (Penicillium, Alternaria)
Evaluation rubric
| Dimension | Weight | Max marks | Excellent | Average | Poor |
|---|---|---|---|---|---|
| Demand-directive understanding | 20% | 10 | Precisely addresses all three directive verbs: 'classify' with clear efficacy-based hierarchy in (a), 'discuss' with exhaustive process detail in (b), and 'explain' with mechanistic depth in (c); maintains appropriate depth-to-marks ratio across parts without over-emphasizing any single section | Addresses all three parts but with uneven depth; either over-expands on pharmacology at expense of butter processing, or provides superficial coverage of diuretic mechanisms while giving excessive detail on egg spoilage; directive verbs interpreted loosely | Misinterprets directives (e.g., merely lists rather than classifies diuretics, describes rather than discusses butter processing, lists without explaining antimicrobial mechanisms); significant imbalance with one part dominating or another virtually ignored |
| Content depth & accuracy | 20% | 10 | Demonstrates specialist-level accuracy: correct molecular targets for each diuretic class (NKCC2, NCC, ENaC, mineralocorticoid receptor); precise butter processing parameters (temperature, pH, fat globule mechanics); accurate identification of specific spoilage organisms and their metabolic pathways in eggs | Generally accurate but with gaps: generic diuretic mechanisms without specific transporter naming; butter process described without critical control points; antimicrobial components mentioned without functional explanation; some confusion between bacterial species and spoilage types | Substantial factual errors: incorrect classification of diuretics (e.g., mixing thiazides with loop diuretics), fundamental errors in butter churning mechanism, misidentification of antimicrobial factors (e.g., confusing lysozyme with lactoferrin), or conflating shell egg spoilage with egg product contamination |
| Structure & flow | 20% | 10 | Crystal-clear tripartite structure with labeled subsections (a), (b), (c); logical internal organization within each part—classification → mechanism → clinical notes for (a), chronological process flow → diagram → defect enumeration for (b), components → spoilage types → preventive implications for (c); seamless transitions between domains | Basic tripartite structure present but internal organization weak: diuretic mechanisms scattered rather than paired with classes; butter processing somewhat jumbled chronologically; egg section conflates antimicrobial components with spoilage without clear demarcation; diagram present but poorly integrated | Poor or absent structure: continuous prose without part demarcation, or arbitrary paragraph breaks; no flow diagram for butter despite explicit requirement; random information dumping without logical progression; missing or incomplete sections |
| Examples / case-law / data | 20% | 10 | Rich, contextually appropriate examples: specific diuretics with veterinary applications (furosemide in congestive heart failure in dogs, hydrochlorothiazide in cattle udder edema); Indian dairy context (AMUL butter processing standards, FSSAI regulations for butter); Indian egg production statistics and spoilage incidence data; references to BIS standards where relevant | Some examples present but limited or generic: standard human pharmacology examples without veterinary adaptation; butter processing described without reference to Indian dairy industry or regulatory standards; egg examples limited to common knowledge without specific organism-strain associations | Virtually no examples, or inappropriate ones: human-centric diuretic use without veterinary relevance; hypothetical or incorrect processing parameters; no mention of specific spoilage organisms by name; complete absence of Indian context despite subject relevance |
| Conclusion & analytical edge | 20% | 10 | Synthesizes across all three parts to extract unifying themes: quality control and safety in animal product processing; draws connections between pharmacological intervention (diuretics in production animals), processing technology, and microbial safety; offers forward-looking insights on integrated food safety management or precision veterinary pharmacology | Brief concluding paragraph summarizing main points without true synthesis; or separate mini-conclusions for each part without cross-domain integration; some attempt at analytical comment but remains descriptive rather than evaluative | No conclusion, or abrupt termination after last sub-part; or completely generic conclusion unrelated to question content; missed opportunity to demonstrate integrative understanding of animal husbandry, veterinary therapeutics, and food technology |
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