RBSE Class 12 Biology Most Repeated Questions 2026 | RBSE 12वीं जीव विज्ञान पिछले 10 वर्षों के प्रश्न

📅 Monday, 12 January 2026 📖 3-5 min read
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RBSE Class 12 Biology – Most Repeated Questions (Last 10 Years Analysis)

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RBSE Class 12 Biology – Most Repeated Questions (Last 10 Years Analysis | High-Probability Set)

यह लेख RBSE Class 12 Biology के पिछले 10 वर्षों के प्रश्नपत्रों के विश्लेषण पर आधारित है। यहाँ उन प्रश्नों को chapter-wise प्रस्तुत किया गया है जो बार-बार पूछे गए हैं या जिनके concepts लगातार repeat होते रहे हैं। यह analysis smart revision और high score targeting के लिए अत्यंत उपयोगी है।

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📊 HOW THIS ANALYSIS IS DONE

  • RBSE Board Question Papers (Last 10 Years)
  • Repeated concepts & direct question repeats
  • Diagram + theory frequency mapping
  • NCERT line-based question tracking

📕 REPRODUCTION – MOST REPEATED QUESTIONS

🔥 High Frequency Questions

  1. Explain double fertilisation with labelled diagram.
  2. Describe the structure of ovule.
  3. Explain menstrual cycle with diagram.
  4. Methods of contraception (any four).

Trend Insight: Double fertilisation + reproductive diagrams हर 2–3 वर्ष में अनिवार्य रूप से पूछे गए हैं।

📕 GENETICS & EVOLUTION – MOST REPEATED QUESTIONS

🔥 High Frequency Questions

  1. Explain Mendel’s monohybrid cross with Punnett square.
  2. Differentiate between homologous and analogous organs.
  3. Describe DNA structure with diagram.
  4. Explain Darwin’s theory of natural selection.

Trend Insight: Genetics से numerical + diagram based प्रश्न सबसे अधिक repeat हुए हैं।

📕 HUMAN HEALTH & DISEASE – MOST REPEATED QUESTIONS

  1. Explain immunity and its types.
  2. Write causes, symptoms and prevention of AIDS.
  3. Vaccination and its importance.
Exam Insight:
• Repeated questions = safest scoring zone
• Same concepts different wording में पूछे जाते हैं
• Diagrams + NCERT language = full marks

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RBSE Class 12 Biology – Most Repeated Questions (Last 10 Years Analysis – Part 2)

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RBSE Class 12 Biology – Most Repeated Questions (Biotechnology, Microbes & Ecology)

यह Article 32 का दूसरा भाग है, जिसमें Biotechnology, Microbes in Human Welfare तथा Ecology & Environment से पिछले 10 वर्षों में बार-बार पूछे गए प्रश्न और उनके patterns को chapter-wise प्रस्तुत किया गया है। यह section scoring के लिहाज़ से अत्यंत महत्वपूर्ण है क्योंकि यहाँ से direct NCERT-based questions आते हैं।

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📕 BIOTECHNOLOGY – MOST REPEATED QUESTIONS

🔥 High Frequency Theory Questions

  1. Explain recombinant DNA technology with suitable diagram.
  2. Describe the steps involved in PCR technique.
  3. What is genetic engineering? Write its applications.
  4. Production of human insulin using rDNA technology.

🧬 Repeated Diagrams

  • Steps of rDNA technology
  • PCR cycle diagram

Trend Insight:
Biotechnology से प्रश्न अक्सर process + diagram combo में आते हैं। यदि diagram सही है तो full marks मिलते हैं।

📕 MICROBES IN HUMAN WELFARE – MOST REPEATED QUESTIONS

🔥 High Frequency Questions

  1. Role of microbes in sewage treatment.
  2. Biogas plant – construction and working.
  3. Commercial use of microbes in industry.

🧫 Repeated Diagrams

  • Biogas plant
  • Sewage treatment flow diagram

Trend Insight:
यह chapter diagram-based scoring chapter माना जाता है। Biogas plant diagram लगभग हर alternate year पूछा गया है।

📕 ECOLOGY & ENVIRONMENT – MOST REPEATED QUESTIONS

🔥 High Frequency Questions

  1. Ozone depletion – causes and effects.
  2. Greenhouse effect and global warming.
  3. Solid waste management.

📈 Data / Graph Based Trends

  • Ozone depletion reactions
  • Greenhouse gases list

Trend Insight:
Environmental issues से प्रश्न अक्सर direct NCERT lines पर आधारित होते हैं। Story writing से बचें, point-wise answers लिखें।

📌 OVERALL DIAGRAM REPEAT LIST (LAST 10 YEARS)

  1. Flower L.S.
  2. Female reproductive system
  3. DNA double helix
  4. Monohybrid cross
  5. Biogas plant
  6. Plasmodium life cycle
  7. rDNA technology steps
Scoring Hack:
• Above diagrams = 15–18 marks guarantee
• Clear labelling is more important than artistic drawing
• Pencil + ruler = best combination

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RBSE Class 12 Biology – Most Repeated Questions (Final Set)

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RBSE Class 12 Biology – Most Repeated Questions (Last 10 Years Final Prediction & Strategy)

यह Article 32 का अंतिम भाग है, जिसमें Mixed Repeated Questions Set, high-probability exam predictions और final scoring strategy दी गई है। यदि विद्यार्थी केवल इस list को भी अच्छी तरह तैयार कर लें, तो 40–45 marks तक सुरक्षित किए जा सकते हैं।

Must-Use Along With:

🔥 MIXED MOST REPEATED QUESTIONS (TOP PRIORITY)

🧬 1. Genetics & Molecular Biology

  1. Explain monohybrid cross with Punnett square.
  2. Describe DNA structure with labelled diagram.
  3. Explain DNA replication (semi-conservative).
  4. Differentiate between homologous and analogous organs.

🌸 2. Reproduction

  1. Explain double fertilisation with diagram.
  2. Structure of ovule / embryo sac.
  3. Explain menstrual cycle with diagram.
  4. Methods of contraception (any four).

🧫 3. Biotechnology & Microbes

  1. Steps of recombinant DNA technology.
  2. PCR technique – principle and steps.
  3. Role of microbes in sewage treatment.
  4. Biogas plant – construction and working.

🌍 4. Health & Environment

  1. Immunity – types and functions.
  2. AIDS – cause, symptoms and prevention.
  3. Ozone depletion – causes and effects.
  4. Greenhouse effect and global warming.

📊 FINAL EXAM PREDICTION (RBSE BIOLOGY)

  • 1 long answer from Genetics / Reproduction
  • 1 compulsory diagram (Flower / DNA / Biogas)
  • 1 case study or assertion–reason question
  • Environmental issues से 1 short answer

Prediction Accuracy: पिछले trends के अनुसार ऊपर दिए गए areas से 60–70% paper cover होने की संभावना रहती है।

🎯 FINAL SMART STRATEGY (LAST DAYS)

  • Repeated questions को exact NCERT language में तैयार करें
  • Diagrams रोज़ 10 मिनट practice करें
  • Answers point-wise + headings में लिखें
  • Overwriting से बचें

⚠️ WHAT NOT TO DO

  • New topics शुरू न करें
  • Guess-based preparation न करें
  • Diagrams को ignore न करें
Final Truth:
RBSE Biology में questions नए लगते हैं, लेकिन concepts वही पुराने होते हैं। जो student repeated concepts master कर लेता है, वही topper बनता है।

📘 Complete RBSE Class 12 Biology Ecosystem

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