Medical Science 2021 Paper I 50 marks Compulsory Enumerate

Q5

(a) Define 'metastasis'. Enumerate the steps involved in metastasis. Write briefly about the role of stromal elements in metastasis. 10 marks (b) (i) Explain the functions of each class of immunoglobulins. Describe the subsets of T-lymphocytes. 5 marks (ii) List the intestinal and extraintestinal manifestations of amoebiasis. 5 marks (c) Discuss about the longer acting insulin analogues. How are they different from insulin preparations? Mention the therapeutic uses and adverse effects of insulin. 10 marks (d) Define chronic inflammation. Enumerate the causes of chronic inflammation. What is the role of macrophages in chronic inflammation? 10 marks (e) Enumerate the data of identification. Write a note on fingerprinting. 10 marks

हिंदी में प्रश्न पढ़ें

(a) 'विशेष' को परिभाषित कीजिए। विशेष से सम्बद्ध चरणों को उल्लिखित कीजिए। विशेष में पीठिका (स्ट्रोमल) तत्वों की भूमिका के बारे में संक्षेप में लिखिए। 10 (b) (i) प्रत्येक श्रेणी की इम्यूनोग्लोबुलिनों के कार्यों की व्याख्या कीजिए। T-लसिकाकोशिकाओं के उपवर्गों (सबसेट) का वर्णन कीजिए। 5 (ii) अमीबा-रणता की आंत्रीय तथा अनांत्रीय अभिव्यक्तियों की सूची प्रस्तुत कीजिए। 5 (c) दीर्घकालिक क्रियाशील (लांगर एक्टिंग) इंसुलिन समधर्मियों की व्याख्या कीजिए। ये इंसुलिन योगों से किस प्रकार भिन्न हैं? इंसुलिन के चिकित्सकीय उपयोगों तथा प्रतिकूल प्रभावों को उल्लिखित कीजिए। 10 (d) चिरकारी शोथ को परिभाषित कीजिए। चिरकारी शोथ के कारक गिनाइए। चिरकारी शोथ में बृहत् भक्षक (मैक्रोफेज) की क्या भूमिका होती है? 10 (e) वैयक्तिक अनन्यता के आधार (डेटा ऑफ आइडेंटिफिकेशन) गिनाइए। अंगुली रेखालेख (फिंगरप्रिंटिंग) पर एक टिप्पणी लिखिए। 10

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Directive word: Enumerate

This question asks you to enumerate. 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

This multi-part question requires systematic enumeration across six sub-parts spanning pathology, microbiology, immunology, pharmacology and forensic medicine. Allocate time proportionally: ~20% each for (a), (c), (d), (e) at 10 marks each; ~10% each for (b)(i) and (b)(ii) at 5 marks each. Structure each sub-part with precise definitions first, followed by numbered enumerations, then explanatory elaboration where marks permit. Use diagrams for metastasis steps, immunoglobulin structure, and fingerprint patterns.

Key points expected

  • (a) Metastasis: Definition as spread of malignant cells; sequential steps (invasion, intravasation, circulation, extravasation, colonization); stromal roles including ECM remodeling, angiogenesis via VEGF, CAF activation, and pre-metastatic niche formation
  • (b)(i) Immunoglobulins: IgG (secondary response, placental transfer), IgM (primary response, complement fixation), IgA (mucosal immunity), IgE (allergies, parasitic), IgD (B-cell receptor); T-cell subsets: CD4+ Th1/Th2/Th17/Treg and CD8+ CTL with their cytokine profiles
  • (b)(ii) Amoebiasis: Intestinal (dysentery, flask-shaped ulcers, amoeboma) and extraintestinal (liver abscess most common, lung/brain involvement, cutaneous lesions)
  • (c) Insulin analogues: Glargine, detemir, degludec with 24-hour action; differences from human insulin (amino acid substitutions, hexamer stabilization); therapeutic uses in T1DM, T2DM, gestational diabetes; adverse effects including hypoglycemia, lipodystrophy, weight gain
  • (d) Chronic inflammation: Definition (>2 weeks, mononuclear infiltrate); causes (persistent infections like TB/leprosy, autoimmune diseases, foreign bodies, silica); macrophage roles (antigen presentation, cytokine secretion IL-1/TNF-α, tissue remodeling, giant cell formation)
  • (e) Forensic identification: Anthropometric (Bertillon), dactylography, DNA profiling, odontology; fingerprinting: ridge patterns (arch/loop/whorl), minutiae points, Galton details, AFIS, poroscopy, and medicolegal significance in Indian criminal procedure

Evaluation rubric

DimensionWeightMax marksExcellentAveragePoor
Concept correctness25%12.5Precise definitions across all sub-parts: metastasis as 'discontinuous' spread, accurate immunoglobulin functions with clinical correlates (IgG subclass deficiencies), correct insulin analogue pharmacokinetics (peakless profiles), macrophage activation states (M1/M2), and fingerprint ridgeology with Henry classificationGenerally correct definitions with minor errors; confuses IgM/IgG timing; vague on insulin differences; incomplete macrophage functions; basic fingerprint types without minutiaeIncorrect definitions (e.g., metastasis as direct spread); wrong immunoglobulin associations; confuses insulin with oral hypoglycemics; omits macrophage antigen presentation; confuses fingerprint with palm print
Clinical correlation20%10Links metastasis to TNM staging and prognosis; connects IgE to Indian allergic asthma prevalence; relates amoebic liver abscess to endemic areas (Delhi, Kolkata); discusses insulin analogues in basal-bolus regimens; cites TB as leading cause of chronic inflammation in India; references Aadhaar fingerprint biometric integrationSome clinical links mentioned superficially; generic disease associations without Indian context; standard textbook correlations without applicationNo clinical correlations; purely theoretical answers; misses disease relevance entirely
Diagram / pathway20%10Clear diagram of metastasis cascade with labeled steps; immunoglobulin structure diagram (Y-shaped with Fab/Fc); T-cell differentiation flowchart; fingerprint ridge patterns (arch/loop/whorl) with core/delta markings; insulin action timeline graph comparing analogue vs regular insulinOne or two relevant diagrams with partial labeling; text descriptions substituting for required visuals; poorly drawn but recognizable structuresNo diagrams where essential (metastasis, immunoglobulin, fingerprint); or completely incorrect schematic representations
Differential / staging15%7.5Distinguishes metastasis from direct invasion and seeding; differentiates Th1 vs Th2 responses in intracellular vs humoral immunity; contrasts acute vs chronic inflammation temporally and cytologically; distinguishes fingerprint subtypes (ulnar/radial loops) for identification accuracyBasic distinctions without depth; some comparisons present but incomplete; confuses related concepts partiallyNo differentials provided; conflates distinct entities (e.g., metastasis with metaplasia); fails to compare insulin types
Management / public-health angle20%10Anti-metastatic strategies (anti-VEGF, MMP inhibitors); immunoglobulin replacement therapy for primary immunodeficiencies; amoebiasis prevention (sanitation, metronidazole mass treatment); insulin analogues improving glycemic control and reducing hypoglycemia in Indian diabetic population; fingerprinting in criminal justice system and disaster victim identification (DVI)Generic management points without specificity; standard drug mentions without public health context; routine preventive measures listedNo management or public health content; omits therapeutic uses of insulin; ignores forensic identification utility

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