Biology-II

This is a complete, free study companion for Biology-II — built around what the exam actually asks. The topics examiners repeat most are Double fertilisation and triple fusion in angiosperms, Restriction enzymes, palindromic sites and sticky ends, and Mendelian inheritance and test cross. The syllabus runs to 5 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 NEET body, so always confirm the current syllabus and exam dates on the official NEET website before you rely on them.

Key information

Level: UG
Programme: Undergraduate
Stream: PCB
Exam: National Eligibility cum Entrance Test (Undergraduate)
Conducted by: National Testing Agency (NTA)

Most frequently examined topics

#	Topic	Times asked
1	Double fertilisation and triple fusion in angiosperms	8
2	Restriction enzymes, palindromic sites and sticky ends	7
3	Mendelian inheritance and test cross	7
4	Hardy-Weinberg equilibrium and factors causing evolution	7
5	Population growth models and carrying capacity	7
6	DNA replication, Meselson-Stahl experiment and enzymes	7
7	Genetic code and translation	6
8	Bt cotton, cry genes and insect resistance	6
9	Energy flow, trophic levels and 10 percent law	6
10	Contraception and reproductive health methods	6
11	Chromosomal disorders: Down, Turner and Klinefelter syndromes	6
12	Biodiversity patterns, species-area relationship and hotspots	6

Counted across the official previous-year question papers we have analysed for this subject. It shows what has been asked before — it does not predict what will appear in your exam. Always confirm the current syllabus on the official portal.

What you will study (chapters)

Chapter 1: Reproduction
Chapter 2: Genetics and Evolution
Chapter 3: Biology and Human Welfare
Chapter 4: Bi Biotechnology and Its Applications
Chapter 5: Ecology and Environment

How to study Biology-II and score well

Start with the highest-frequency topics — In Biology-II, Double fertilisation and triple fusion in angiosperms, Restriction enzymes, palindromic sites and sticky ends, Mendelian inheritance and test cross, and Hardy-Weinberg equilibrium and factors causing evolution 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 NEET Biology-II 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 5 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-II

Where students lose marks: attempting questions they have not truly eliminated options for, spending too long on one hard question, and rushing the sections they know best. Read the whole paper first, bank the marks you are sure of, and come back to the rest.

Manage your time and guess carefully: split your time in proportion to the marks each section carries and keep a few minutes at the end to check. This paper carries negative marking, so attempt a question only when you can rule out at least one or two options — a blind guess costs you marks. Confirm the exact marking scheme for your session on the official portal.

Frequently asked questions

What are the most important topics in Biology-II?

Based on past papers, the most frequently asked topics include Double fertilisation and triple fusion in angiosperms, Restriction enzymes, palindromic sites and sticky ends, Mendelian inheritance and test cross. The full ranked list with how often each appears is in the "Most important topics" section above.

Where can I download Biology-II previous-year question papers?

Official NEET previous-year question papers are available on the official NEET 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-II 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.

A Gyani AI tutor trained on the Biology-II syllabus and past papers can quiz you on the most-asked topics and show you exactly what to revise.