Top Methods to Prepare for CBSE Class 12 Biology Exam 2024-25

Top Methods to Prepare for CBSE Class 12 Biology Exam 2024-25

Biology is a very interesting subject as it focuses on the study of living beings, including ourselves and our surrounding matter like plants, microbes, etc. This is the basic science subject that is compulsory to study like other science subjects i.e Physics and Chemistry. 

The Central Board of Secondary Education (CBSE) has designed the Biology syllabus with the objective to promote the understanding of the basic principles of Biology. So every year CBSE revises its class 12 Biology syllabus and releases it on its official website. 

This year also CBSE did the same and released the latest Class 12 Biology Syllabus 2024-25 which we will be talking about in detail along with some top-notch study tips to cover and study for CBSE Class 12 Biology Paper. 


               Class XII Biology Syllabus 2024-25

Units Unit Name Marks
VI Reproduction 16
VII Genetics and Evolution 20
VIII Biology and Human Welfare 12
IX Biotechnology and its Applications 12
X Ecology and Environment 10
Two Experiments (05+04) + Slide Preparation (05) + Spotting (07) + Investigatory Project, its Record & Viva (05) + Practical Record & Viva (04)


CBSE Class 12 Biology Syllabus: Unit-wise Breakdown

Unit-VI Reproduction

Chapter 2: Sexual Reproduction in Flowering Plants

Flower structure; development of male and female gametophytes; pollination – types, agencies, and examples; out breeding devices; pollen-pistil interaction; double fertilization; post-fertilization events – development of endosperm and embryo, development of seed and formation of fruit; special modes- apomixis, parthenocarpy, polyembryony; Significance of seed dispersal and fruit formation.

Chapter 3: Human Reproduction

Male and female reproductive systems; microscopic anatomy of testis and ovary; gametogenesis-spermatogenesis and oogenesis; menstrual cycle; fertilization, embryo development up to blastocyst formation, implantation; pregnancy and placenta formation (elementary idea); parturition (elementary idea); lactation (elementary idea).

Chapter 4: Reproductive Health

Need for reproductive health and prevention of Sexually Transmitted Diseases (STDs); birth control – need and methods, contraception and medical termination of pregnancy (MTP); amniocentesis; infertility and assisted reproductive technologies – IVF, ZIFT, GIFT (Elementary idea for general awareness).

Unit-VII Genetics and Evolution

Chapter 5: Principles of Inheritance and VariationHeredity and variation: Mendelian inheritance; deviations from Mendelism – incomplete dominance, co-dominance, multiple alleles and inheritance of blood groups, pleiotropy; elementary idea of polygenic inheritance; chromosome theory of inheritance; chromosomes and genes; Sex determination – in humans, birds and honey bees; linkage and crossing over; sex-linked inheritance – hemophilia, color blindness; Mendelian disorders in humans – thalassemia; chromosomal disorders in humans; Down’s syndrome, Turner’s and Klinefelter’s syndromes.

Chapter 6: Molecular Basis of Inheritance

Search for genetic material and DNA as genetic material; Structure of DNA and RNA; DNA packaging; DNA replication; Central Dogma; transcription, genetic code, translation; gene expression and regulation – lac operon; Genome, Human and rice genome projects; DNA fingerprinting.

Chapter 7: Evolution

Origin of life; biological evolution and evidence for biological evolution (paleontology, comparative anatomy, embryology, and molecular evidence); Darwin’s contribution, to modern synthetic theory of evolution; mechanism of evolution – variation (mutation and recombination) and natural selection with examples, types of natural selection; Gene flow and genetic drift; Hardy – Weinberg’s principle; adaptive radiation; human evolution.

Unit-VIII Biology and Human Welfare

Chapter 8: Human Health and Diseases

Pathogens; parasites causing human diseases (malaria, dengue, chikungunya, filariasis, ascariasis, typhoid, pneumonia, common cold, amoebiasis, ringworm) and their control; Basic concepts of immunology – vaccines; cancer, HIV and AIDS; Adolescence – drug and alcohol abuse.

Chapter 10: Microbes in Human Welfare

Microbes in food processing, industrial production, sewage treatment, energy generation, and microbes as bio-control agents and bio-fertilizers. Antibiotics; production and judicious use.


Unit-IX Biotechnology and its Applications

Chapter 11: Biotechnology – Principles and Processes

Genetic Engineering (Recombinant DNA Technology).

Chapter 12: Biotechnology and its Applications

Application of biotechnology in health and agriculture: Human insulin and vaccine production, stem cell technology, gene therapy; genetically modified organisms – Bt crops; transgenic animals; biosafety issues, biopiracy and patents.

Unit-X Ecology and Environment

Chapter 13: Organisms and Populations

Population interactions – mutualism, competition, predation, parasitism; population attributes – growth, birth rate and death rate, age distribution. (Topics excluded: Organism and its Environment, Major Abiotic Factors, Responses to Abiotic Factors, Adaptations).

Chapter 14: Ecosystem

Ecosystems: Patterns, components; productivity and decomposition; energy flow; pyramids of number, biomass, energy (Topics excluded: Ecological Succession and Nutrient Cycles).

Chapter 15: Biodiversity and its Conservation

Biodiversity- concept, patterns, importance; loss of biodiversity; biodiversity conservation; hotspots, endangered organisms, extinction, Red Data Book, Sacred Groves, biosphere reserves, national parks, wildlife, sanctuaries, and Ramsar sites.

Top Methods to Prepare for CBSE Class 12 Biology 2024-25

Biology is a very interesting subject, and that’s what makes it very scoring. Although there are various ways to score good marks in biology, we are going to provide some of the best ways that will help cover your CBSE Class 12 Biology  Syllabus 2025 as well as help you score good marks in the exam cbse board exam. Before we get started you have to cover it is advised that you download the latest  CBSE Class 12 Biology Syllabus pdf and study it thoroughly. 

  • Create a Study Schedule

After you have gone through the Class 12 biology syllabus, create a study plan for each chapter. Write the topics, time, day, etc., in the study plan and paste it around your study table. Make sure you include all the topics and deadlines for each topic as this will leave you some room for revision. 

  • Refer to Additional Resources

While NCERT textbooks are Bible for covering the CBSE  Class 12 Biology Syllabus, additional resources like reference books, online resources, and videos will supplement your studies to gain a deeper understanding of complex topics.

  • Create Flashcards

To make learning long-lasting you have to avoid the rot learning method and adopt methods that are more creative and fun. For instance, you can create flashcards for important definitions, formulas, and diagrams. Use these flashcards for quick revision, especially during the last few days before the exam.

  • Diagram Practice

Biology is well understood and better retained in the memory if you practice diagrams. Make practice reproducing diagrams accurately and labeling them correctly to ensure you can do so during the exam. If you can remember labeled diagrams well you can easily relate the process and explain it in a very lucid way when asked in the board exam. 

  • Practice Previous Year’s Papers 

Solving previous year’s question papers of CBSE Class 12 Biology is like a map to the hidden treasure. This helps you with understanding the exam pattern, question types, and difficulty level of the paper.  This will also help you identify important topics and focus areas. Also when you solve past year’s Biology Class 12 paper by simulating the exam environment you will feel the pressure of finishing the question paper in time. This way you will also learn to perform under stress and work on your weak spot. 

  • Mock Tests

Take regular mock tests to assess your preparation level and identify weak areas. The more mock paper you solve the better you will get at improving your speed and accuracy. So practice as much mock paper as you can. 

Scoring good marks in CBSE Biology Class 12 Paper is easy. Just go through the syllabus create a study schedule and follow the tips mentioned above. Read More …

Happy Studying!!

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