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    Important Biology Chapters For AIIMS BSc Nursing Exam 2027

    Important Biology Chapters For AIIMS BSc Nursing Exam 2027

    #AIIMS Nursing
    Irshad AnwarUpdated on 25 Aug 2026, 10:03 AM IST

    Important Biology chapters for AIIMS BSc Nursing 2027 should be focused upon by the candidates in the process of preparing for the AIIMS BSc Nursing Entrance Exam. Biology consists of 30 marks in the latest available AIIMS BSc Nursing Exam Pattern, which makes it one of the three subjects along with Physics and Chemistry. The 2026 paper of AIIMS BSc Nursing consisted of 30 Biology questions out of a total of 100 questions, with 1 mark being provided for every correct answer and 1/3rd mark being deducted for an incorrect answer. The exact pattern of the AIIMS BSc Nursing 2027 should be known by candidates after the official notification is released.

    This Story also Contains

    1. AIIMS BSc Nursing Biology Chapter-wise Weightage
    2. Important Biology Chapters for AIIMS BSc Nursing: Chapter-wise Overview
    3. Important Questions from Biology Chapters for AIIMS BSc Nursing 2027 Exam
    4. Common Mistakes Students Make While Preparing Biology for AIIMS BSc Nursing 2027
    5. AIIMS BSc Nursing Biology Preparation Strategy
    6. How to Score 28+ Marks in Biology for AIIMS BSc Nursing 2027
    Important Biology Chapters For AIIMS BSc Nursing Exam 2027
    Important Biology Chapters for AIIMS BSc Nursing Exam

    Also read:

    As far as the preparation for the Biology paper of the AIIMS BSc Nursing Entrance Exam is concerned, the Class 11 and Class 12 syllabus should form the crux of the preparation of the candidates. NCERT concepts, biological processes, genetics, human physiology, human reproduction, ecology, and human health topics should be prepared with utmost focus.

    In this article, the candidates can have a look at the important chapters of biology for AIIMS BSc Nursing 2027, topics for revision, chapter-wise priorities, preparation tips, and mistakes to be avoided while preparing for the entrance examination. It should be kept in mind that AIIMS does not provide chapter-wise weightage of Biology in its exam, hence, it should be considered as a guideline.

    AIIMS BSc Nursing Biology Chapter-wise Weightage

    No chapter-wise weightage is given officially by AIIMS for Biology. Hence, the aspirants must not depend on getting a fixed number of questions from each chapter. The chapter-wise preference can be made based on the syllabus, previous year papers, current trend of paper, and importance of NCERT concepts.

    Human Physiology, Cell Biology, Genetics, Molecular Biology, Reproduction, Human Health and Diseases, Plant Physiology and Ecology are a few of the chapters which need to be prioritised because these chapters cover a lot of concepts and questions can be framed from them.

    The aspirants also need to keep in mind that the chapters marked as low priority must not be totally neglected because questions can be asked from various topics of the Class 11 & 12 Biology syllabus.

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    Important Biology Chapters for AIIMS BSc Nursing: Chapter-wise Overview

    Some of the important Biology chapters and key topics for the AIIMS Nursing Exam:

    Chapter Name

    Key Topics

    Cell: Structure and Functions

    • Structure of Cells: Understand the differences between prokaryotic and eukaryotic cells.

    • Functions of Organelles: Study the roles of various organelles such as the nucleus, mitochondria, endoplasmic reticulum, and ribosomes.

    Cell Cycle and Cell Division

    • Mitosis: It is a type of cell division that produces two genetically identical daughter cells, helping in growth, repair, and maintenance of the body.

    • Meiosis: Meiosis is a cell division that reduces the chromosome number by half, forming four genetically unique haploid cells.

    Body Fluids and Circulation

    • Components: Blood transports gases, nutrients, and wastes, while the heart acts as a pump that circulates blood.

    • Homeostasis: Understand the mechanisms that maintain a stable internal environment.

    Exchange of Gases

    • Lung Volume and Lung Capacity: Lung volume is the quantity of air during breathing, while lung capacity is the combination of the volume.

    Principles of Inheritance and Variation

    • Mendelian Genetics: Study the principles of inheritance, including dominant and recessive traits.

    • Chromosomal Abnormalities: These abnormalities occur due to changes in chromosome number or structure, leading to disorders like Down, Turner, or Klinefelter syndromes.

    Molecular Basis of Inheritance

    • DNA Structure and Function: Understand the role of DNA in heredity and protein synthesis.

    • Central Dogma: The central dogma describes the flow of genetic information from DNA to RNA and RNA to protein.

    • Human Genome Project: The Human Genome Project mapped the entire human DNA sequence.

    Human Health and Diseases

    • Classification of Microorganisms: Understand the characteristics of bacteria, viruses, fungi, and protozoa.

    • Pathogenesis: Learn how microorganisms cause diseases and the body’s immune response.

    • Infection Control: Familiarise yourself with strategies for preventing infections in healthcare settings.

    Organisms and Population

    • Ecosystem Dynamics: Study the components of ecosystems and how energy flows through them.

    • Ecological Interactions: These are relationships between organisms such as predation, competition, and mutualism.

    Ecosystem

    • Ecological Pyramids: These are graphs that represent the flow of energy, biomass, or number of organisms at different trophic levels in an ecosystem.

    Apart from preparing with these important chapters from Biology, you should also check a complete list of Important Chapters for AIIMS BSc Nursing Exam: Subject-wise to know clearly which chapters should be prioritised for a balanced preparation in all the subjects.

    Important Questions from Biology Chapters for AIIMS BSc Nursing 2027 Exam

    Here’s a table of important questions related to important biology chapters for the AIIMS BSc Nursing Exam, along with their answers:

    S. No

    Question

    Answer

    Chapter Name

    1

    What is the basic unit of life?

    Cell

    Cell Biology

    2

    What are the main components of the circulatory system?

    Human Heart, blood vessels, blood

    Human Anatomy and Physiology

    3

    What is Mendel's law of segregation?

    Alleles separate during gamete formation

    Genetics and Evolution

    4

    What is the role of bacteria in the nitrogen cycle?

    Nitrogen fixation

    Microbiology

    5

    What is an ecosystem?

    A community of living organisms interacting with their environment

    Ecology and Environment

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    Common Mistakes Students Make While Preparing Biology for AIIMS BSc Nursing 2027

    Candidates often spend a great deal of time just reading Biology but neglect the aspect of practising questions and recalling information.

    • Wasting too much time on less important topics, while not completing important NCERT chapters as per AIIMS BSc Nursing chapter-wise weightage.

    • Studying NCERT just once rather than revising important information from NCERT several times.

    • Using many other books rather than mastering NCERT.

    • Solving MCQs without analysing wrong answers and guessing.

    • Answering questions without careful thinking, despite having negative marking in the examination.

    • Memorising information but not understanding biological mechanisms and their interconnection.

    AIIMS BSc Nursing Biology Preparation Strategy

    In order to prepare for AIIMS BSc Nursing Biology, one should know about the syllabus, practice questions regularly, and prepare accordingly. Below are some tips that can help you enhance your overall performance in the exam:

    • Study NCERT Line by Line: This is because most of the questions are either directly or indirectly based on NCERT. Make notes from the chapters and revise them regularly. Students can also refer to the to strengthen the concepts of Biology deeply and revise important chapters with more efficiency.

    • Prepare Using Previous Year Questions: The preparation with the help of AIIMS BSc Nursing Previous Year's Papers will help you know about the pattern of the exam and questions that are asked regularly.

    • Practice chapter-wise MCQs: After completing each unit, practise questions of the same unit. This not only strengthens your memory but also helps you know the type of questions asked in the exams.

    • Revise diagrams: Most of the students leave diagrams and tables given in the NCERT textbook. Do not forget to revise them as questions are asked from them as well.

    • Weekly mixed-chapter test: After you have completed a few chapters, take a test consisting of questions from all the chapters. This will make you aware of your strong and weak points. Practice of AIIMS BSc Nursing Mock test is also helpful for time management.

    • Making notes with the help of charts and tables: Making notes with the help of charts & tables is beneficial for quick revision during the last few days of the exam.

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    How to Score 28+ Marks in Biology for AIIMS BSc Nursing 2027

    Many students lose marks in Biology not because the questions are difficult, but because direct lines from NCERT, diagrams, and statement-based concepts are often revised superficially. Read the points given below to understand what needs to be done to score 28+ in the AIIMS Nursing exam.

    • Understand how to approach elimination-based questions to avoid negative marking.

    • At least revise one unit per day rather than studying the same unit for many hours at a time.

    • Maintain a notebook of all your mistakes committed during the process of solving practice and previous-year questions. Work on correcting them for the final exam.

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    AIIMS BSc Nursing entrance exam question papers are not available in Hindi medium. You can access the previous year's question papers and solutions from the link below:
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