Biology

This is a complete, free study companion for Biology — built around what the exam actually asks. The topics examiners repeat most are Human Physiology (Digestion, Circulation, Excretion, Neural & Chemical Control), Genetics and Evolution, and Cell: Structure and Functions. The syllabus runs to 24 chapters. Below you'll find the full topic-frequency ranking, the exam paper pattern, every chapter, a step-by-step study plan, and the official downloads — everything in one place.

Everything here is free. We're an independent student resource, not the official CET body, so always confirm the current syllabus and exam dates on the official CET website before you rely on them.

Key information

Level: Class 11-12
Programme: State CET (PCB)
Stream: Science
Exam: MHT-CET, KCET, KEAM, TG/AP EAPCET, GUJCET
Conducted by: State CET authorities

Frequently examined topics: Human Physiology (Digestion, Circulation, Excretion, Neural & Chemical Control), Genetics and Evolution, Cell: Structure and Functions, Plant Physiology, Reproduction (Human and Plant), Biotechnology and its Applications, Ecology and Environment, Biomolecules, Human Health and Disease, Microbes and Biology in Human Welfare.

What you will study (chapters)

Chapter 1: The Living World
Chapter 2: Biological Classification
Chapter 3: Plant Kingdom
Chapter 4: Animal Kingdom
Chapter 5: Morphology of Flowering Plants
Chapter 6: Anatomy of Flowering Plants
Chapter 7: Structural Organisation in Animals
Chapter 8: Cell: The Unit of Life
Chapter 9: Biomolecules
Chapter 10: Cell Cycle and Cell Division
Chapter 11: Transport, Mineral Nutrition and Photosynthesis in Plants
Chapter 12: Respiration in Plants and Plant Growth
Chapter 13: Digestion, Circulation, Excretion and Locomotion
Chapter 14: Neural and Chemical Coordination
Chapter 15: Reproduction in Organisms and Flowering Plants
Chapter 16: Human Reproduction and Reproductive Health
Chapter 17: Principles of Inheritance and Variation
Chapter 18: Molecular Basis of Inheritance
Chapter 19: Evolution
Chapter 20: Human Health and Disease
Chapter 21: Microbes in Human Welfare
Chapter 22: Biotechnology: Principles and Applications
Chapter 23: Organisms, Populations and Ecosystems
Chapter 24: Biodiversity and Conservation

How to study Biology and score well

Start with the highest-frequency topics — In Biology, Human Physiology (Digestion, Circulation, Excretion, Neural & Chemical Control), Genetics and Evolution, Cell: Structure and Functions, and Plant Physiology appear again and again in past papers. Master these first — they return the most marks for the time you put in.
Practise with previous-year papers — Solve the last 5–10 years of CET Biology papers under timed, exam-like conditions. Past papers show exactly which topics repeat and how questions are worded.
Revise actively, not passively — Write a one-page summary for each of the 24 chapters — key definitions, formulas and the points examiners reward — then re-test yourself instead of re-reading.
Mark your answers with the official scheme — After each practice paper, score yourself against the official marking scheme. It shows how marks are awarded step-by-step, so you learn to present answers the way examiners expect.

Exam tips: how to score higher in Biology

Where students lose marks: rushing the high-weightage questions, skipping the steps the marking scheme rewards, and saving easy sections for last. Read the whole paper first, attempt your strongest section early to bank marks, and always show your working.

Manage your time: split your time in proportion to the marks each section carries, keep a few minutes at the end to check, and never leave a question blank — a partial, structured answer still earns partial marks.

Frequently asked questions

What are the most important topics in Biology?

Based on past papers, the most frequently asked topics include Human Physiology (Digestion, Circulation, Excretion, Neural & Chemical Control), Genetics and Evolution, Cell: Structure and Functions. The full ranked list with how often each appears is in the "Most important topics" section above.

Where can I download Biology previous-year question papers?

Official CET previous-year question papers are available on the official CET website. Open the Question Papers section for the direct link, plus the exam pattern and the topics that repeat most.

How can I prepare for Biology faster?

Start with the highest-frequency topics, learn the exam pattern so you know how each section is marked, and practise with past papers. A subject-aware study tutor can quiz you on exactly these topics.