CBSE-CLASS-XII
Biology Analysis
Comprehensive breakdown of 125 chapters with 1081 previous year questions. Explore priority-sorted content and weightage analytics.
125
Chapters
1081
Total Questions
PYQ
Years Covered
accountancy agriculture air-conditioning-and-refrigeration applied-mathematics artificial-intelligence automotive banking beauty-and-wellness biology biotechnology business-administration business-studies carnatic-music-melodic-instruments carnatic-music-percussion-instruments carnatic-music-vocal chemistry commercial-art computer-awareness computer-science cost-accounting data-science design design-thinking-and-innovation early-childhood-care-and-education economics electrical-technology electronics-technology engineering-graphics english english-core english-elective entrepreneurship environmental-sciences environmental-studies fashion-studies financial-markets-management food-nutrition food-production french front-office-operations general-aptitude geography geospatial-technology graphics health-care hindi-elective hindustani-music-melodic-instruments hindustani-music-percussion-instruments history home-science horticulture informatics-practice information-technology insurance kathak-dance knowledge-traditions-and-practices-of-india legal-studies marketing mass-media mathematics painting physical-activity-trainer physical-education physics political-science psychology retail sanskrit sociology typography-and-computer-applications yoga ह-द
Chapters
Sorted by Questions high Yield
Biotechnology
High-Yield Trend
12
2026 71
2025 16
2024 Topics 0
Questions 99
high Yield
Human Health And Disease
High-Yield Trend
9
2026 42
2025 8
2024 Topics 0
Questions 59
high Yield
Human Reproduction
High-Yield Trend
5
2026 44
2025 8
2024 Topics 0
Questions 57
high Yield
Principles Of Inheritance And Variation
High-Yield Trend
5
2026 51
2025 1
2024 Topics 0
Questions 57
high Yield
Structure And Development Of Seed And Fruit
High-Yield Trend
56
2024 Topics 0
Questions 56
high Yield
Molecular Basis Of Inheritance
High-Yield Trend
5
2026 42
2025 5
2024 Topics 0
Questions 52
high Yield
Biogas Plant
High-Yield Trend
46
2024 Topics 0
Questions 46
high Yield
Evolution
High-Yield Trend
7
2026 25
2025 7
2024 Topics 0
Questions 39
high Yield
Genetics
High-Yield Trend
12
2026 10
2025 12
2024 Topics 0
Questions 34
high Yield
Sexual Reproduction In Flowering Plants
High-Yield Trend
6
2026 25
2025 2
2024 Topics 0
Questions 33
high Yield
Assisted Reproductive Technology
High-Yield Trend
30
2024 Topics 0
Questions 30
high Yield
Microbes In Human Welfare
High-Yield Trend
4
2026 23
2025 1
2024 Topics 0
Questions 28
medium Yield
Ecosystem
High-Yield Trend
4
2026 10
2025 8
2024 Topics 0
Questions 22
medium Yield
Biodiversity And Conservation
High-Yield Trend
4
2026 12
2025 4
2024 Topics 0
Questions 20
medium Yield
Ecology
High-Yield Trend
6
2026 3
2025 10
2024 Topics 0
Questions 19
medium Yield
Organisms And Populations
High-Yield Trend
4
2026 12
2025 2
2024 Topics 0
Questions 18
medium Yield
Transcription
High-Yield Trend
4
2025 10
2024 Topics 0
Questions 14
medium Yield
Reproduction In Plants
High-Yield Trend
3
2026 3
2025 7
2024 Topics 0
Questions 13
low Yield
Applications Of Biotechnology
High-Yield Trend
12
2025 Topics 0
Questions 12
low Yield
Molecular Biology
High-Yield Trend
11
2025 1
2024 Topics 0
Questions 12
low Yield
Pollination
High-Yield Trend
8
2025 4
2024 Topics 0
Questions 12
low Yield
The Dna
High-Yield Trend
12
2024 Topics 0
Questions 12
low Yield
Inheritance Of Two Genes
High-Yield Trend
11
2024 Topics 0
Questions 11
low Yield
A Brief Account Of Evolution
High-Yield Trend
10
2024 Topics 0
Questions 10
low Yield
Blood
High-Yield Trend
2
2025 8
2024 Topics 0
Questions 10
low Yield
Immunology
High-Yield Trend
3
2026 5
2025 2
2024 Topics 0
Questions 10
low Yield
Reproductive Health
High-Yield Trend
2
2026 4
2025 4
2024 Topics 0
Questions 10
low Yield
Ecology And Environment
High-Yield Trend
7
2025 2
2024 Topics 0
Questions 9
low Yield
Origin And Evolution Of Man
High-Yield Trend
9
2024 Topics 0
Questions 9
low Yield
Genetic Engineering And Biotechnology
High-Yield Trend
1
2025 7
2024 Topics 0
Questions 8
low Yield
Human Body
High-Yield Trend
1
2025 7
2024 Topics 0
Questions 8
low Yield
Menstrual Cycle
High-Yield Trend
1
2025 7
2024 Topics 0
Questions 8
low Yield
Reproduction In Organisms
High-Yield Trend
3
2025 5
2024 Topics 0
Questions 8
low Yield
Diseases
High-Yield Trend
7
2024 Topics 0
Questions 7
low Yield
Diseases And Causes
High-Yield Trend
7
2024 Topics 0
Questions 7
low Yield
Drugs
High-Yield Trend
7
2024 Topics 0
Questions 7
low Yield
Inheritance Of One Gene
High-Yield Trend
7
2024 Topics 0
Questions 7
low Yield
Genetics And Evolution
High-Yield Trend
6
2024 Topics 0
Questions 6
low Yield
Inheritance Patterns
High-Yield Trend
6
2025 Topics 0
Questions 6
low Yield
Reproductive Health Problems And Strategies
High-Yield Trend
6
2025 Topics 0
Questions 6
low Yield
Biodiversity
High-Yield Trend
5
2025 Topics 0
Questions 5
low Yield
Human Development
High-Yield Trend
5
2024 Topics 0
Questions 5
low Yield
Replication
High-Yield Trend
5
2024 Topics 0
Questions 5
low Yield
Antibiotics
High-Yield Trend
4
2024 Topics 0
Questions 4
low Yield
Biological Evolution
High-Yield Trend
4
2024 Topics 0
Questions 4
low Yield
Immunity
High-Yield Trend
3
2025 1
2024 Topics 0
Questions 4
low Yield
Microbiology
High-Yield Trend
4
2026 Topics 0
Questions 4
low Yield
Mutation
High-Yield Trend
4
2024 Topics 0
Questions 4
low Yield
Origin Of Life
High-Yield Trend
4
2024 Topics 0
Questions 4
low Yield
Population Ecology
High-Yield Trend
4
2024 Topics 0
Questions 4
low Yield
Recombinant Dna Technology And Applications
High-Yield Trend
4
2024 Topics 0
Questions 4
low Yield
Reproduction
High-Yield Trend
4
2024 Topics 0
Questions 4
low Yield
Rna World
High-Yield Trend
4
2024 Topics 0
Questions 4
low Yield
Why Do We Fall Ill
High-Yield Trend
4
2024 Topics 0
Questions 4
low Yield
Apomixis And Polyembryony
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
Cell Structure And Organelles
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
Environment And Natural Resources
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
General Physiology
High-Yield Trend
3
2026 Topics 0
Questions 3
low Yield
Genetic Code
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
Genetic Disorders
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
Medicinal Plants
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
Mendel S Laws Of Inheritance
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
Parasitology
High-Yield Trend
3
2026 Topics 0
Questions 3
low Yield
Sex Determination
High-Yield Trend
2
2025 1
2024 Topics 0
Questions 3
low Yield
Social Evolution
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
The Female Reproductive System
High-Yield Trend
2
2026 1
2024 Topics 0
Questions 3
low Yield
The Food Chain
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
The Search For Genetic Material
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
Translation
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
Types Of Cells
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
What Is Adaptive Radiation
High-Yield Trend
3
2024 Topics 0
Questions 3
low Yield
Biomolecules
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Coordination In Plants
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Development Of Male And Female Gametophyte
High-Yield Trend
2
2025 Topics 0
Questions 2
low Yield
Diversity In The Living World
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Endocrinology
High-Yield Trend
2
2026 Topics 0
Questions 2
low Yield
Environment
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Evolution Of Life Forms A Theory
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Hardy Weinberg Principle
High-Yield Trend
1
2025 1
2024 Topics 0
Questions 2
low Yield
Human Anatomy
High-Yield Trend
2
2025 Topics 0
Questions 2
low Yield
Inheritance Of Haemophilia
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Mendelian Genetics
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Morphology Of Flowering Plants
High-Yield Trend
2
2025 Topics 0
Questions 2
low Yield
Nucleic Acids And Nucleotides
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Pathogens
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Pcr
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Pcr And Thermostable Dna Polymerase
High-Yield Trend
2
2025 Topics 0
Questions 2
low Yield
Plant Kingdom
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Plant Physiology Biochemistry
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Pleiotropy
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Polygenic Inheritance
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Population Dynamics
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Proteins
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Regulation Of Gene Expression
High-Yield Trend
1
2025 1
2024 Topics 0
Questions 2
low Yield
Sexual Reproduction
High-Yield Trend
1
2025 1
2024 Topics 0
Questions 2
low Yield
Structure Of Dna And Rna
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Wastewater Management
High-Yield Trend
2
2024 Topics 0
Questions 2
low Yield
Bacteria Archea Virus And Their Broad Classification
High-Yield Trend
1
2024 Topics 0
Questions 1
low Yield
Blood Group Inheritance
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Dna Replication
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Drug Testing
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Ecological Pyramids
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Ecosystems And Biodiversity
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Enzymes
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Eukaryotic Transcription
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Fertilisation And Implantation
High-Yield Trend
1
2024 Topics 0
Questions 1
low Yield
Flower A Fascinating Organ Of Angiosperms
High-Yield Trend
1
2024 Topics 0
Questions 1
low Yield
Glucose
High-Yield Trend
1
2024 Topics 0
Questions 1
low Yield
Human Genome
High-Yield Trend
1
2024 Topics 0
Questions 1
low Yield
Immune System
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Industrial Melanism In Moths
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Microbial Fermentation
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Natural Selection
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Non Biodegradable Pollutant
High-Yield Trend
1
2024 Topics 0
Questions 1
low Yield
Nucleic Acids
High-Yield Trend
1
2024 Topics 0
Questions 1
low Yield
Plant Evolution
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Population Stabilisation And Birth Control
High-Yield Trend
1
2024 Topics 0
Questions 1
low Yield
Principles Of Mendelian Inheritance
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Product Life Cycle
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Respiratory Infections
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Rna Transcription
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Soils
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Spermatogenesis
High-Yield Trend
1
2025 Topics 0
Questions 1
low Yield
Strategies For Enhancement In Food Production
High-Yield Trend
1
2026 Topics 0
Questions 1
low Yield
The Male Reproductive System
High-Yield Trend
1
2024 Topics 0
Questions 1
About Biology for CBSE-CLASS-XII
Scoring high in Biology is crucial for clearing the CBSE-CLASS-XII cut-offs. Our chapter-wise breakdown helps you understand exactly which topics have historically carried the most weightage in the exam.
By practicing Biology previous year questions, you can familiarize yourself with the recurring concepts, difficulty level, and framing of questions. We recommend starting your revision with the chapters that have the highest number of PYQs listed above.
Biology Preparation FAQs
How is the Biology section structured in CBSE-CLASS-XII?
The Biology section tests your fundamental understanding and application of concepts. Reviewing the PYQs will give you a clear picture of the theoretical vs numerical ratio and the depth of knowledge required.
Which chapters should I prioritize in Biology?
The chapters are already sorted by the number of questions asked in previous years. Focus your initial preparation on the chapters at the top of the list, as they historically yield the most marks.