Medical Science 2023 Paper I 50 marks Describe

Q2

A 56-year-old male visits a surgery OPD with complaints of difficulty in passage of urine especially on straining. Based on his clinical examination and ultrasound findings, he is diagnosed with Benign hypertrophy of Prostate. (i) What is the anatomical basis of his urinary problems ? (5 marks) (ii) Describe the relations of Prostate gland. (5 marks) (iii) Describe the blood supply and lymphatic drainage of Prostate gland. (5 marks) (b) (i) Describe the biochemical role of copper in the body. Discuss briefly about Wilson disease and the biochemical investigations that will help in its diagnosis. (10 marks) (ii) Define Genetic code and explain the Wobble Hypothesis. Discuss briefly the post-translational modifications of proteins. (10 marks) (c) Explain the physiological changes that occur in a mother during pregnancy, under the following headings : (i) Genital organs (5 marks) (ii) Blood and its constituents (5 marks) (iii) Cardiovascular system (5 marks)

हिंदी में प्रश्न पढ़ें

एक 56-वर्षीय पुरुष सर्जरी ओ.पी.डी. में आता है । उसे मूत्र त्यागने में कठिनाई होने की शिकायत है । यह कठिनाई विशेषकर जोर लगाने पर होती है । उसकी रोगलाक्षणिक जाँच तथा अल्ट्रासाउंड जाँच पर दिखी विशेषताओं के आधार पर यह निदान बना है कि उसे पुरुष की सुदम्य अतिवृद्धि है । (i) उसकी मूत्रीय समस्याओं का शरीररचना की दृष्टि से क्या आधार है ? (5 अंक) (ii) पुरुष ग्रंथि के संबंधों का वर्णन कीजिए । (5 अंक) (iii) पुरुष ग्रंथि की रक्त आपूर्ति तथा लसीका जल-निकासी का वर्णन कीजिए । (5 अंक) (b) (i) शरीर में ताँबे की जैव-रासायनिक भूमिका का वर्णन कीजिए । विल्सन रोग तथा उसके निदान में सहायक सिद्ध होने वाली जैव-रासायनिक जाँचों की संक्षेप में व्याख्या कीजिए । (10 अंक) (ii) जेनेटिक कोड को परिभाषित कीजिए तथा वॉबल परिकल्पना की व्याख्या कीजिए । प्रोटीनों के पोस्ट-ट्रांसलेशनल आपरिवर्तनों की संक्षेप में व्याख्या कीजिए । (10 अंक) (c) निम्नलिखित शीर्षकों के अंतर्गत एक गर्भवती माता में गर्भावस्था की अवधि में होने वाले शारीरक्रियात्मक परिवर्तनों की व्याख्या कीजिए : (i) जननांगी अंग (5 अंक) (ii) रक्त एवं उसके घटक (5 अंक) (iii) हृद्-वाहिका तंत्र (5 अंक)

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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 directive 'describe' demands comprehensive, structured exposition of anatomical, biochemical, and physiological facts. Allocate approximately 30% of time to part (a) prostate anatomy (15 marks), 40% to part (b) biochemistry (20 marks), and 30% to part (c) pregnancy physiology (15 marks). Structure each sub-part with clear headings: for (a) use anatomical zones and relations; for (b) use biochemical pathways and disease mechanisms; for (c) use system-based physiological changes. Include labeled diagrams for prostate relations and cardiovascular changes.

Key points expected

  • Part (a)(i): Median lobe enlargement compressing prostatic urethra at the bladder neck; internal sphincter involvement causing obstructive symptoms
  • Part (a)(ii): Anterior-pubic symphysis and retropubic space; posterior-rectovesical septum and Denonvilliers' fascia; lateral-levator ani; superior-bladder neck; inferior-urogenital diaphragm and external urethral sphincter
  • Part (a)(iii): Arterial supply from inferior vesical, middle rectal, and internal pudendal arteries; venous drainage to prostatic venous plexus → internal iliac veins; lymphatics to internal iliac, sacral, and obturator nodes
  • Part (b)(i): Copper as cofactor for cytochrome c oxidase, superoxide dismutase, lysyl oxidase, ceruloplasmin; Wilson disease as ATP7B mutation causing defective copper excretion and ceruloplasmin deficiency; diagnostic tests: serum ceruloplasmin, serum copper, 24-hour urinary copper, hepatic copper concentration, Kayser-Fleischer rings
  • Part (b)(ii): Genetic code as triplet, non-overlapping, degenerate, universal, commaless; Wobble hypothesis (Crick) explaining third base degeneracy with anticodon wobble position; post-translational modifications: phosphorylation, glycosylation, ubiquitination, proteolytic cleavage, disulfide bond formation
  • Part (c): Genital organs-uterine enlargement, cervical softening, vaginal vascularity; Blood-increased plasma volume, physiological anemia, hypercoagulability; Cardiovascular-increased cardiac output, decreased peripheral resistance, supine hypotension syndrome, hemodilution

Evaluation rubric

DimensionWeightMax marksExcellentAveragePoor
Concept correctness25%12.5Demonstrates precise anatomical knowledge of prostatic zones (peripheral, central, transitional, anterior fibromuscular stroma) and their clinical significance; accurately describes copper biochemistry with correct enzyme names and cofactor functions; explains genetic code characteristics with correct wobble base pairing rules; states pregnancy physiological changes with accurate percentage increases (e.g., plasma volume +40-50%, cardiac output +30-50%)Describes basic prostate anatomy and relations with minor errors in nomenclature; mentions copper enzymes without specific functions; defines genetic code but confuses wobble hypothesis details; lists pregnancy changes without quantitative data or precise mechanismsConfuses prostatic urethra with membranous urethra; omits key copper enzymes or misidentifies Wilson disease inheritance; fails to explain wobble hypothesis or confuses post-translational modifications; makes significant errors in pregnancy cardiovascular physiology directionality
Clinical correlation20%10Explicitly links median lobe hypertrophy to bladder outlet obstruction and urinary retention; connects Wilson disease ATP7B mutation to hepatic and neurological manifestations with Indian prevalence context; correlates pregnancy hemodilution with physiological anemia of pregnancy; mentions BPH as common condition in Indian men >50 yearsMentions obstructive uropathy without specific mechanism; describes Wilson disease symptoms without mutation correlation; notes anemia in pregnancy without explaining physiological basis; limited epidemiological contextNo clinical correlation attempted; fails to explain why BPH causes urinary symptoms; describes Wilson disease as purely hepatic or purely neurological without systemic involvement; omits pregnancy adaptations entirely
Diagram / pathway20%10Includes well-labeled coronal section of prostate showing zones, urethra, and ejaculatory ducts; draws copper metabolism pathway from absorption to excretion; illustrates wobble base pairing with anticodon-codon interaction; sketches cardiovascular changes graph showing cardiac output and blood pressure trends in pregnancyMentions need for diagrams but provides poorly labeled or incomplete sketches; describes pathways in text without visual representation; includes generic diagrams not specific to question requirementsNo diagrams despite anatomical and pathway components; fails to describe any pathway in sufficient detail for reconstruction; omits visual learning aids entirely
Differential / staging15%7.5Differentiates BPH from prostate cancer (hard, irregular nodule vs. smooth enlargement) and prostatitis; distinguishes Wilson disease from other copper overload conditions (Menkes disease, Indian childhood cirrhosis); contrasts normal pregnancy adaptations from pathological conditions (preeclampsia, anemia requiring supplementation)Mentions prostate cancer as differential without distinguishing features; lists other copper disorders without comparison; limited differentiation of normal vs. abnormal pregnancy statesNo differential diagnosis provided; confuses BPH with malignancy features; fails to distinguish Wilson disease from other metabolic disorders; no recognition of pathological pregnancy variants
Management / public-health angle20%10Mentions 5-alpha reductase inhibitors and alpha-blockers for BPH with surgical options (TURP); describes chelation therapy (D-penicillamine, trientine) and zinc acetate for Wilson disease with liver transplant indication; discusses antenatal care protocols and iron supplementation programs in India (IFA tablets, JSY); notes newborn screening relevance for Wilson diseaseLists medical management without mechanism; mentions chelation without specific agents; notes iron supplementation without program details; limited public health integrationNo management mentioned for any condition; omits preventive or therapeutic aspects entirely; fails to connect to national health programs or screening initiatives

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