RBSE Class 12 Biology – Full Length Mock Test (Solved)

यह mock test module RBSE blueprint, NCERT language और examiner checking pattern पर आधारित है। यह केवल practice paper नहीं, बल्कि real exam simulator है। यदि छात्र इसे सही तरीके से attempt करें, तो final exam performance में स्पष्ट सुधार देखने को मिलता है।

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📊 OFFICIAL-STYLE BLUEPRINT (BIOLOGY)

Section	Question Type	No. of Questions	Marks
A	MCQs	10 × 1	10
B	Very Short Answer	5 × 2	10
C	Short Answer	5 × 3	15
D	Long Answer	4 × 5	20
E	Diagram Based	2 × 5	10
Total			65

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📝 FULL LENGTH MOCK TEST – PAPER 1

SECTION A – MCQs (10 × 1 = 10)

1. Double fertilisation occurs in —
   (a) Gymnosperms (b) Angiosperms (c) Algae (d) Bryophytes
2. LH surge induces —
   (a) Menstruation (b) Ovulation (c) Fertilisation (d) Implantation
3. DNA replication is —
   (a) Conservative (b) Dispersive (c) Semi-conservative (d) Random
4. Bt cotton is resistant to —
   (a) Virus (b) Fungus (c) Insect pests (d) Bacteria
5. Greenhouse gas mainly responsible for global warming —
   (a) O₂ (b) N₂ (c) CO₂ (d) H₂

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SECTION B – VERY SHORT ANSWER (5 × 2 = 10)

1. Define pollination.
2. What is immunity?
3. Write one function of tRNA.
4. What is PCR?
5. Define global warming.

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SECTION C – SHORT ANSWER (5 × 3 = 15)

1. Explain monohybrid cross.
2. Differentiate between homologous and analogous organs.
3. Describe menstrual cycle.
4. Explain steps of sewage treatment.
5. Write any three causes of ozone depletion.

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SECTION D – LONG ANSWER (4 × 5 = 20)

1. Explain double fertilisation with labelled diagram.
2. Describe structure of DNA.
3. Explain recombinant DNA technology.
4. Describe causes and effects of global warming.

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SECTION E – DIAGRAM BASED (2 × 5 = 10)

1. Draw and label L.S. of flower.
2. Draw and label DNA double helix.

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© ncertclasses.com | RBSE Class 12 Biology – Full Length Mock Test System

RBSE Class 12 Biology – Full Length Mock Test Solved Answers (Examiner Style)

यह section exact वही answers दिखाता है जैसे RBSE examiner expect करता है। NCERT language, keywords और structure को जानबूझकर preserve किया गया है ताकि विद्यार्थी answer-writing में गलती न करें।

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✅ SECTION A – MCQs (Solved)

1. (b) Angiosperms
2. (b) Ovulation
3. (c) Semi-conservative
4. (c) Insect pests
5. (c) CO₂

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✅ SECTION B – VERY SHORT ANSWERS (2 Marks)

Q1. Define pollination.
Pollination is the transfer of pollen grains from the anther to the stigma of a flower.

Q2. What is immunity?
Immunity is the ability of the host to resist disease.

Q3. One function of tRNA.
tRNA carries specific amino acids to the ribosome during protein synthesis.

Q4. What is PCR?
PCR (Polymerase Chain Reaction) is a technique used to amplify DNA segments.

Q5. Define global warming.
Global warming refers to the increase in average temperature of the Earth due to greenhouse gases.

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✅ SECTION C – SHORT ANSWERS (3 Marks)

Q1. Explain monohybrid cross.

• A monohybrid cross involves study of inheritance of one character.
• It shows a phenotypic ratio of 3:1 in F₂ generation.
• It was studied by Mendel.

Q2. Homologous vs Analogous organs.

• Homologous organs have same origin but different functions.
• Analogous organs have different origin but same function.
• Homologous organs show divergent evolution.

Q3. Describe menstrual cycle.

• It is a monthly cycle of changes in the ovary and uterus.
• LH surge induces ovulation.
• Average duration is 28 days.

Q4. Steps of sewage treatment.

• Primary treatment removes large particles.
• Secondary treatment uses microbes.
• Activated sludge reduces BOD.

Q5. Causes of ozone depletion.

• Release of CFCs
• Use of aerosol sprays
• Industrial pollutants

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✅ SECTION D – LONG ANSWERS (5 Marks)

Q1. Explain double fertilisation with diagram.

• It occurs only in angiosperms.
• One male gamete fuses with egg → zygote.
• Other male gamete fuses with polar nuclei → endosperm.
• This process is called double fertilisation.

Diagram: L.S. of ovule

Q2. Structure of DNA.

• DNA is a double-stranded helical structure.
• It has sugar-phosphate backbone.
• Bases pair via hydrogen bonds.
• Strands are antiparallel.

Q3. Recombinant DNA technology.

• Isolation of desired gene
• Cutting by restriction enzyme
• Ligation into vector
• Transformation into host
• Expression of gene

Q4. Global warming – causes and effects.

• Increase in greenhouse gases
• Melting of glaciers
• Climate change
• Rise in sea level

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✅ SECTION E – DIAGRAM BASED

Q1. L.S. of flower
Labels: Anther, Filament, Stigma, Style, Ovary, Ovule

Q2. DNA double helix
Labels: Sugar-phosphate backbone, Base pairs, Hydrogen bonds

© ncertclasses.com | RBSE Biology Mock Test – Solved Answers System

RBSE Class 12 Biology – Mock Test Performance Optimisation

यह section mock test attempt करने के बाद performance सुधारने के लिए बनाया गया है। अक्सर students syllabus जानते हैं, लेकिन time management और avoidable mistakes के कारण marks खो देते हैं। यहाँ वही practical बातें दी गई हैं जो examiner copies में रोज़ देखता है।

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⏱️ IDEAL TIME MANAGEMENT (3 HOURS PAPER)

Stage	Recommended Time	Purpose
Reading Question Paper	15 minutes	Section selection, confidence build
Section A (MCQs)	15–20 minutes	Quick scoring + momentum
Section B (Very Short)	20 minutes	Direct NCERT definitions
Section C (Short)	35–40 minutes	Concept + keywords
Section D (Long)	55–60 minutes	Main scoring area
Section E (Diagrams)	15–20 minutes	Easy full marks
Final Revision	10 minutes	Check labels & numbering

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⚠️ MOST COMMON MISTAKES (EXAMINER OBSERVATION)

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✅ TOPPERS क्या अलग करते हैं

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🧠 MOCK TEST ANALYSIS TEMPLATE (SELF USE)

👉 हर mock test के बाद यह analysis करने वाला student final exam में repeat mistakes नहीं करता।

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© ncertclasses.com | RBSE Biology – Mock Test Performance System

RBSE Class 12 Biology – Full Length Mock Test (Pattern Variation & Case Study Based)

यह mock test standard paper से थोड़ा higher level पर रखा गया है, ताकि student case study, assertion-reason और application-based questions के लिए mentally तैयार हो सके। यह final exam में surprise factor को neutralize करता है।

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📊 PAPER STRUCTURE (VARIATION)

Section	Type	Questions	Marks
A	MCQs + Assertion-Reason	10 × 1	10
B	Very Short Answer	5 × 2	10
C	Short Answer	5 × 3	15
D	Long Answer	3 × 5	15
E	Case Study Based	3 × 5	15
Total			65

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📝 FULL LENGTH MOCK TEST – PAPER (VARIATION)

SECTION A – MCQs / ASSERTION–REASON

1. Assertion (A): Double fertilisation is unique to angiosperms.
   Reason (R): Two male gametes take part in fertilisation.
2. Assertion (A): HIV affects immune system.
   Reason (R): It destroys helper T-cells.
3. Bt cotton resists insects due to —
   (a) Antibiotics (b) Cry protein (c) Virus (d) Hormones

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SECTION B – VERY SHORT ANSWER

1. What is test cross?
2. Define vaccine.
3. What is greenhouse effect?
4. Write full form of ADA.
5. Name one biodegradable pollutant.

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SECTION C – SHORT ANSWER

1. Explain incomplete dominance.
2. Differentiate between active and passive immunity.
3. Write steps of PCR.
4. What is eutrophication?
5. Write three features of DNA.

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SECTION D – LONG ANSWER

1. Explain menstrual cycle with hormonal control.
2. Describe structure of RNA.
3. Explain effects of air pollution.

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SECTION E – CASE STUDY BASED QUESTIONS

Case Study 1:
A farmer observed that his Bt cotton crop showed resistance to insect pests, while normal cotton plants were heavily damaged.

1. Name the gene responsible for resistance.
2. How does it act?
3. From which organism is it obtained?

Case Study 2:
During blood transfusion, wrong blood group may lead to clumping of RBCs.

1. Name the phenomenon.
2. Which antibodies are responsible?
3. Why O group is universal donor?

Case Study 3:
Excessive use of fertilizers causes nutrient enrichment of water bodies.

1. Name the process.
2. Write one harmful effect.
3. Suggest one control measure.

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© ncertclasses.com | RBSE Biology – Pattern Variation Mock Test

RBSE Class 12 Biology – Rank Booster Mock Test

यह mock test जानबूझकर थोड़ा कठिन रखा गया है। इसका उद्देश्य syllabus दोहराना नहीं, बल्कि student की concept clarity, application skill और pressure handling को test करना है। यदि कोई विद्यार्थी इस test में comfortable है, तो वह final RBSE exam में naturally excel करेगा।

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📊 DIFFICULTY DESIGN (WHY THIS WORKS)

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📝 RANK BOOSTER MOCK TEST – PAPER

SECTION A – CONCEPTUAL MCQs

1. Failure of segregation of chromosomes during meiosis results in —
2. Which process links transcription and translation in prokaryotes?
3. Gene therapy is most suitable for correction of —
4. Increase in BOD indicates —

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SECTION B – VERY SHORT (THINKING BASED)

1. Why is pollen grain considered male gametophyte?
2. Why are homologous organs preferred evidence of evolution?
3. Why is Bt toxin harmless to humans?

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SECTION C – SHORT ANSWER (INTEGRATED)

1. Explain how double fertilisation ensures seed nourishment.
2. Relate central dogma with protein synthesis.
3. Explain link between sewage treatment and environmental protection.

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SECTION D – LONG ANSWER (TOPPER ZONE)

1. Describe recombinant DNA technology and justify its importance in medicine.
2. Explain global warming and suggest biological control measures.

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SECTION E – CASELET (RANK DIFFERENTIATOR)

A child suffering from ADA deficiency was treated using gene therapy.

1. What is ADA deficiency?
2. Which cells are used in this therapy?
3. Why is this therapy considered temporary?

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© ncertclasses.com | RBSE Biology – Rank Booster System

RBSE Class 12 Biology – Answer Writing Mastery

यह मॉड्यूल examiner की नज़र से answer writing सिखाता है। RBSE में marks अक्सर concept पर नहीं, presentation, structure और NCERT keywords पर कटते हैं। यहाँ वही नियम दिए गए हैं जो average answer को high-scoring answer में बदलते हैं।

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🧠 EXAMINER कैसे सोचता है (Reality)

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✍️ ANSWER STRUCTURE (MARKS-WISE)

Marks	Ideal Structure
1	One line, exact NCERT term
2	Definition / two crisp points
3	3 bullet points OR definition + 2 points
5	Intro (1 line) + points + diagram/flowchart

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✅ GOOD vs ❌ WEAK ANSWER (Example)

Question: What is immunity?

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🖍️ KEYWORD UNDERLINING (MARKS MULTIPLIER)

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✏️ DIAGRAM INTEGRATION RULE

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⚠️ COMMON PRESENTATION MISTAKES

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🏆 TOPPER TEMPLATE (USE THIS)

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© ncertclasses.com | RBSE Biology – Answer Writing Mastery System

RBSE Class 12 Biology – PYQ Advanced Analysis

यह analysis module RBSE पिछले वर्षों के प्रश्नपत्रों पर आधारित है। यह केवल questions की list नहीं, बल्कि repetition logic, chapter dominance और safe exam prediction का framework देता है। इसका उद्देश्य guess करवाना नहीं, बल्कि preparation को data-driven बनाना है।

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📊 HOW THIS ANALYSIS IS DONE (TRANSPARENT METHOD)

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🔥 HIGH-FREQUENCY CHAPTERS (CONSISTENT)

Unit	Chapter	Repetition Level
Reproduction	Flowering plants, Human reproduction	Very High
Genetics	Inheritance, Molecular basis	Very High
Biotechnology	rDNA, Applications	High
Human Welfare	Health & Disease	Medium–High
Ecology	Environmental issues	High

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🔁 MOST REPEATED QUESTION THEMES

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🧠 QUESTION TYPE PATTERN (EXAMINER FAVOURITES)

Type	Frequency	Safe Strategy
Definitions (2 marks)	Very High	NCERT wording only
Diagrams (5 marks)	High	Neat + labelled
Explain / Describe	High	Point-wise + intro
Case study	Rising trend	Concept application

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⚠️ SAFE PREDICTION vs GUESSING (IMPORTANT)

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🎯 HOW TO USE THIS ANALYSIS (SMART WAY)

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© ncertclasses.com | RBSE Biology – PYQ Advanced Analysis System

RBSE Class 12 Biology – Final 15 Days Smart Strategy

यह strategy last 15 days के लिए बनाई गई है, जहाँ syllabus पूरा करने से ज़्यादा ज़रूरी होता है revision order, mistake control और confidence build। यह plan panic-free है और RBSE examiner expectations के अनुसार aligned है।

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🗓️ DAYS 1–5: CORE STRENGTH PHASE

Day	Focus	Task
Day 1	Reproduction	One Shot notes + key diagrams
Day 2	Genetics	Ratios, crosses, NCERT lines
Day 3	Molecular Biology	DNA, replication, transcription
Day 4	Biotechnology	rDNA steps + applications
Day 5	Ecology	Environmental issues + diagrams

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🗓️ DAYS 6–10: PRACTICE & CORRECTION PHASE

Day	Focus	Task
Day 6	Mock Test (Normal)	Attempt + analysis
Day 7	Weak Areas	NCERT line-by-line fix
Day 8	Pattern Variation Mock	Case study focus
Day 9	Diagram Mastery	All scoring diagrams redraw
Day 10	Answer Writing	Structure + presentation

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🗓️ DAYS 11–13: RANK BOOSTER PHASE

Day	Focus	Task
Day 11	Rank Booster Mock	High-level practice
Day 12	PYQ Trends	Repeated themes revise
Day 13	NCERT Recall	Definitions + key lines

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🗓️ DAYS 14–15: CALM & CONFIDENCE PHASE

Day	Focus	Task
Day 14	Light Revision	Flowcharts + diagrams only
Day 15	Exam Day-1	Rest + confidence + key recall

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🎯 EXAM DAY FINAL CHECKLIST

• Pen + pencil + ruler
• 15 minutes reading time use करें
• Strong section first attempt
• Last 10 minutes revision

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© ncertclasses.com | RBSE Biology – Final 15 Days Strategy System

RBSE Class 12 Biology – Exam Day Strategy

यह guide exam hall के अंदर follow करने के लिए है। यहाँ syllabus या revision नहीं, time, order और presentation decisions बताए गए हैं ताकि कोई भी student unnecessary mistakes से marks न खोए।

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⏱️ FIRST 15 MINUTES (READING TIME)

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🧭 QUESTION ATTEMPT ORDER (SAFE & EFFECTIVE)

Order	Section	Why
1	MCQs	Quick marks + rhythm
2	Very Short	Direct NCERT definitions
3	Diagrams	High scoring, low time
4	Short Answers	Concept clarity
5	Long Answers	Maximum marks block

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✍️ WRITING RULES (INSIDE ANSWER BOOK)

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🖍️ DIAGRAM STRATEGY (FREE MARKS)

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⚠️ PANIC CONTROL (REAL SITUATIONS)

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⏳ LAST 10 MINUTES (MARKS SAVER)

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© ncertclasses.com | RBSE Biology – Exam Day Strategy System

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📘 Complete RBSE Class 12 Biology Exam Preparation System

• RBSE Class 12 Biology One Shot Revision Notes 2026
• RBSE Class 12 Biology NCERT Line-by-Line Key Points 2026
• RBSE Class 12 Biology Diagram Atlas 2026
• RBSE Class 12 Biology Full Length Mock Tests (Solved)
• RBSE Class 12 Biology Final 15 Days Smart Strategy

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