NEET Biology is essentially an indispensable section as it is one of the most scoring subjects if the students plan their preparations wisely. The questions from biology are so comprehensive that a well-prepared student clears this section of NEET almost effortlessly.

NEET Biology section plays an important role in determining the success of students in NEET exam, however, this doesn’t mean that the students neglect the other two subjects. To grab a seat in a top medical or dental college, students are advised to polish their skills in Biology as well as Physics and Chemistry. The difficulty level of Biology has increased over recent years. As per the overall analysis of NEET 2019, it was deemed that the exam fared average on the difficulty meter where amongst all other sections, Biology was considered to be the easiest, followed by Chemistry and then Physics which was the toughest and challenging section demanding time.

When it comes to NEET Biology, the botany section was comparatively challenging. Most of the questions in botany were based on NCERT. Zoology, on the other hand, fared moderately on the difficulty meter. Most numbers of questions appeared from Human Physiology unit.

Also Check
  • Biology MCQs for NEET
  • NEET Biology Flashcards

Given below are some of the important key points about the two crucial parts of Biology, namely, Zoology and Botany.
NEET Biology 2021 important topics and preparation tips

Important Notes of Biology For NEET 2021

Euplectella Spongilla
Cliona Spindle Fibres
Somatic Cells Leptotene
Zygotene Pachytene
Diplotene Diakinesis
Lipase Enzyme Protease Enzyme
What are Greenhouse Gases? What is Plankton
What is Nutrient Cycling Net Primary Productivity
Floral Formula Sycon
Organic Evolution Floral Formula Of Hibiscus
Enzyme Names Plasma Membrane Structure
AMH Hormone Hardy Weinberg Law
Gonadotropin Releasing Hormone Facts About Global Warming and Greenhouse Effect
Catalase Enzyme Facts About Enzymes
Assisted Reproductive Technology Growth Hormone Deficiency
Organisms and Populations Microevolution
Human Reproduction Breathing and Exchange of Gases
Reproduction in Organisms Reproductive Health
Plant Growth And Development Plant Kingdom
Microbes in Human Welfare Environmental Issues
Strategies for Enhancement in Food Production Digestion and Absorption
Body Fluids and Circulation Biomolecules
Principles Of Inheritance And Variation Biological Classification
Living World Anatomy of Flowering Plants
Human Health and Disease Animal Kingdom
Application of Biotechnology Chromosome Structure
Plant Taxonomy Shapes of Bacteria
Adaptive Radiation Morphology Of Flowering Plants
Molecular Basis Of Inheritance Bones of Spine
Humification Mineralisation
Carbon Fixation Important Notes of Biology For NEET Locomotion and Movement
Photosynthetically Active Radiation Importance of Spermatogenesis
Pyramid of Biomass Example Cell Differentiation
Nodule Formation Food Vacuole
Gas Vacuole Which Organism is Known As Drosophila of Plant Kingdom
Significance of Glycolysis Modifications of Stem
Diplontic Life Cycle Opioid Drugs
Genetically Engineered Insulin What is Transduction in Bacteria
Heterotrophic Bacteria Autotrophic Bacteria
DNA Polymerases Telomeres
What is Haemoglobin Medulla Oblongata
Function of Pons Thalamus Function
Equisetum Salvinia
What Are Gametes Pteris
Chondrichthyes Chondrocytes
Squamous Epithelial Cells Lymphocytes
Sensory Receptors Pectoral Girdle
Pelvic Girdle Marchantia

NEET Biology Important Topics – Botany

Protozoa Allosteric Enzyme
Ketogenesis Plasmid
Ecology and Environment Euglena Structure and Classification
Polygenic Inheritance Deuterostomes
Coelom Cell Biology and Division
Ecology Biomolecule
Dinoflagellates Epiphytes
Volvox Penicillium
Spirogyra Connective Tissue
Epithelial Tissue Auxin
Rhizopus Endosperm
Structure of Ear Nucleotide
Slime Moulds Paramecium
Nostoc Chromoplast
Ascomycetes Floral Formula of Solanaceae
Floral Formula of Liliaceae Floral Formula of Fabaceae
Brown Algae Bacteriophage
Lactational Amenorrhea pH Of Blood
Where Does The Oxygen Liberated During Photosynthesis Come From

Important Concepts of Biology for NEET 2021

Fimbriae and Pili Non Vascular Plants
Thyroid Symptoms Algae Bloom
Neural Communication Tetany Causes
Multinodular Goitre Plant Hormones
Thyroid Problems Types of Fermentation
Genetic Diversity Electrocardiogram
Polyarteritis Nodosa Hydroponic System
Biochemical Pathways Uricotelism Definition
Blue Green Algae Krebs Cycle
Pyruvate Biosynthesis
Pharynx Location Log Phase
Lag Phase Trophozoites
Sporozoite Human Food Chain
Double Helix Structure of DNA Bacterial Transformation
Urogenital System of A Frog Constitutive Transcription
Digestive System of Balanoglossus Granulocytes
CD4 Cells Synopsis on Tissues
DNA Ligase Neuron Physiology
Importance of Cell Division Bacterial Viruses
What is Epistasis Lethal Genes
Dryopteris Vas Deferens Function
Fimbriae Function Nondisjunction
RNA Splicing Human Eye Lens
T Lymphocytes

NEET Concept Questions

What is Holoenzyme? What is The Function of Iris?</a
What are The Three Primary Layers of Retina? Where is Optic Nerve Located?
What are Erythrocytes? What is Apoenzyme?
What are Vascular Plants? When does DNA Copying occur?
How do Annelids Feed? How do Plants Reduce Water Loss?
How do Cells Produce New Cells? How does Interphase prepare a cell to divide?
What Is Dwarfism? What is Bioprocessing?
What is Cretinism? What is Ecori
What is Collagen What does QRS Complex Represent In ECG
What are Floating Ribs What is Acromion
Where is Scapula Bone Located Where is The Glenoid Cavity Located
What is The Function Of Cochlea What is The Function Of Eustachian Tube
What is Stroma? What is Spermatid?
What is Fallopian Tube? What is The Blind Spot in Eye?
What is The Function of Cornea? What is The Function of Pupil?
What is The Sclera of Eye? What is The Function of Epididymis?
What is The Function of Stroma Lamellae? What is The Function of Thylakoid?

Short Notes on NEET Biology

Short Notes on Trna Structure Short Notes on Aneuploidy
Short Notes on Hindbrain Short Notes on Cam Plants
Short Notes on Synapse Short Notes on Metaphase
Short Notes on Glycolate Pathway Short Notes on Aschelminthes
Short Notes on Disorders of Bones Short Notes on Disorders of Joints
Short Notes on Disorders of Muscular System

NEET Biology – Weightage of various topics is as follows:

Class XI
Unit Chapters Weightage (approximate)
I Diversity of Living Organisms 12%
II Structural Organisation in Plants & Animals 9%
III Cell: Structure and Function 8%
IV Plant Physiology 8%
V Human Physiology 16%
Class XII
Unit Chapters Weightage
VI Reproduction 11%
VII Genetics and Evolution 13%
VIII Biology and Human Welfare 9%
IX Biotechnology and its Applications 4%
X Ecology and Environment 10%
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Zoology Section

Zoology is all about the interaction of animals with the ecosystem. It is the most interesting stream of Biology and deals with the study of the Animal Kingdom and their structures, evolution, embryology, habits, classification, and distribution of both living and extinct animals. Students are advised to focus more on topics like Reproduction and Human Physiology while preparing for the exam. Given below is a list of topics, important from the examination point of view:

NEET Biology Important Topics – Zoology

Animal Diversity Animal Husbandry Human Health and Diseases
Evolution Animal Tissue Cockroach
Human Physiology Human Reproduction
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NEET 2020 Analysis: Zoology section

Class Chapter name Level of Difficulty
Easy Average Challenging
Class 11 Human Physiology 1 7 4
Biomolecules 3 2 1
Animal Kingdom 2 2 1
Structural organization of animals 1 0 1
Class 12 Animal husbandry and Biotechnology 3 4 3
Human Reproduction and reproductive health 0 2 2
Evolutions theories and evidences 3 0 1
Human Health and diseases 0 3 1
Total Questions 47
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Botany Section

Botany (also known as Phytology) is the Science of Plant Life. It also includes the Study of Fungi and Algae. Modern Botany deals with plant structure, differentiation, growth, biochemistry, reproduction, primary metabolism, disease and plant taxonomy. Students are advised to focus more on topics carrying high weightage like Genetics, Biotechnology, and Ecology while preparing for the exam. In NEET exam, there are typically 45 questions from Botany.

NEET 2020 Analysis: Botany section

Class Chapter name Level of Difficulty
Easy Average Challenging
Class 11 Plant Physiology 3 2 4
Cell and cell cycle 1 1 4
Structural organization of plants 3 0 2
Diversity of Life 1 3 1
Class 12 Genetics 2 1 4
Ecology 2 2 3
Biology in Human welfare 0 1 1
Reproduction and sexual reproduction 1 1 0
Total Questions 43
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Books play a vital role during the exam preparations. The table given below depicts a list of recommended books for NEET Biology apart from NCERT textbook.

NEET Biology Books

S. Chand’s Biology Trueman’s Elementary Biology
Modern’s ABC Biology Pradeep’s A Text Book of Biology
Together with Biology Truman’s Objective Biology

Stay tuned with BYJU’S to know more about each and every topic included in NEET syllabus 2021, preparation tips, previous years question papers, NEET Biology questions, sample papers, study materials, and more.

Frequently Asked Questions on NEET Biology 2021

Which book is best for NEET biology?

NCERT is the holy book for NEET, it should be read line by line and mastered. 80-90% of questions appear from the NCERT syllabus. For the remaining 10-20% questions that are asked, you can refer to these books only, they are more than sufficient – Objective NCERT at your fingertips – MTG, NCERT Exemplar, Trueman’s biology, Arihant, Cengage. Don’t forget to cover the “summary” section provided at the end of each chapter. It has some key points that students usually tend to miss out on.

Is NCERT enough for NEET biology 2021?

No. While NCERT certainly should be your priority for NEET, especially biology, it is not good enough if you aim for a good rank. 80-90% of questions usually are asked from the NCERT syllabus. But, for the remaining 10-20% questions asked outside NCERT, one must refer to other relevant sources as well. NCERT is good to qualify only. With NEET, now being the single level medical entrance test, merging AIIMS and JIPMER from NEET 2021 onwards, the competition is fiercer than ever.

How many chapters in biology for NEET?

38 chapters. NEET Biology syllabus has 10 units, which in turn have 38 chapters in total. 22 chapters are in class 11 NCERT syllabus and the remaining 16 chapters are covered in NCERT Class 12 syllabus.

How many questions in NEET biology are from NCERT?

NEET Biology comprises 90 questions in total. The number of questions appearing in NEET biology from NCERT varies every year. But mostly, questions are asked from NCERT. For exact numbers, NEET 2019 had nearly 84 questions either indirectly or directly from NCERT, out of these 84, 78 questions were purely NCERT based. Similarly, NEET 2018 had a total of 82 questions appearing from NCERT and NEET 2017 had nearly 76 questions from NCERT. Trends keep changing every year.