CBSE Class 12 Biology Syllabus 2023: Check Revised Biology Syllabus for Class 12th CBSE Academic Year 2022-23

Table of Contents

CBSE Class 12 Biology Syllabus 2023: The CBSE class 12 board exams act as a decider for students preparing to get admission to the college of their dreams. So students must utilize their time in the best possible way to prepare for the class 12 board exams effectively. The hard work and dedication put in by these students today will surely pay off in the future. Every year, we come across numerous toppers, so don’t students wonder how they got there? The main reason behind this is the efforts and commitment that are put in by these students.

Now the question arises, how do students tend to accomplish all of this? The simple answer to this question is a well-examined syllabus and planning future preparations accordingly with full concentration. For detailed answers use NCERT Solutions for Class 12 Biology.

CBSE Class 12 Biology Syllabus 2022-23: Exam Scheme & Revised Course

Check the complete syllabus below along with the new exam scheme.

Unit	Title	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

Chapterwise Syllabus for CBSE CLass 12 Biology

Unit-VI Reproduction

Chapter- 2: Sexual Reproduction in Flowering Plants

Flower structure; development of male and female gametophytes; pollination – types, outbreeding 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; fertilisation, embryo development up to blastocyst formation, implantation; pregnancy and placenta formation (Elementary idea); parturition (elementary idea); lactation

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 Variation

Heredity and variation: Mendelian inheritance; deviations from Mentalism – 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 – haemophilia, colour 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 (palaeontology, comparative anatomy, embryology and molecular evidence); Darwin’s contribution, 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

Also See:

CBSE Class 12 Syllabus 2023

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, ring worm) 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

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

NCERT Solutions for CBSE Class 12 Biology

FAQs on CBSE Class 12 Biology Syllabus

1. When is CBSE Class 12 Biology Exam 2022-23 going to be conducted?

The CBSE board has not yet released the dates for the upcoming CBSE class 12 board exams 2022-23.

2. Are Aakash's biology study materials beneficial?

Yes. Aakash study material is beneficial. It provides the best study material by using easy languages which will make any average student a topper. At Aakash, you will find the best quality of teachers. All you need to do is to join Aakash Byju's and bring out the best studies.

3. What is the importance of the CBSE Class 12 Biology Syllabus?

The CBSE class 12 Biology syllabus 2022-23 provides thorough information on the major sections and topics of each subject.

1. The Biology syllabus outlines the full course structure, including the chapter weightage for each unit.
2. The CBSE curriculum defines the question paper format, allowing students to become familiar with the types of questions
3. The Biology syllabus assists students in effectively preparing for class 12 board

4. Will there be 2 terms in 2023?

The CBSE will no longer hold term 1 and term 2 exams in 2023, instead of conducting Class 10 and 12 exams only once, as in prior years. According to the CBSE's official announcement, the decision to return to the annual board test format was made after a thorough review of the new system and input from different authorities.

5. Is Class 12 Bio hard?

It is difficult for some students to prepare for the Class 12 Biology Board exam. If they want to top in the Class 12 Biology exam then they have to study with complete hard work and dedication.

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