NEET 2021 Zoology paper analysis

Zoology chapters and topics asked in NEET 2021

Chapters are ranked by questions in this paper. Under each chapter are the topics that were asked; “new” marks a topic with no question in any earlier paper.

• Animal Kingdom

  12+8

  Classification of Animals (Non Chordata) (Characteristic Feature and… ×2 new · Classification of Animals (Non Chordata) (Characteristic Feature and… ×2 new · Classification of Animals (Non Chordata) (Characteristic Feature and… · Classification of Chordata (Characteristic Feature and Examples -… new · Classification of Animals (Non Chordata) (Characteristic Feature and… new · Classification of Animals (Non Chordata) (Characteristic Feature and… new · Classification of Animals (Non Chordata) (Characteristic Feature and… new · Classification of Animals (Non Chordata) (Characteristic Feature and… new · Classification of Animals (Non Chordata) (Characteristic Feature and… new · Classification of Animals (Non Chordata) (Characteristic Feature and… new

• Biotechnology - Principles and Processes

  8+3

  Polymerase Chain Reaction (Denaturation, Annealing, etc.) ×3 new · Tools of Recombinant DNA Technology (Restriction Enzymes and Other… ×2 · Gel Electrophoresis (Separation and Isolation of DNA Fragments) · Processes of Recombinant DNA Technologies (Isolation of the Genetic… new · Identification of Clones having Recombinant DNA (Antibiotic… new

• Biotechnology and its Applications

  7+4

  Biotechnological Applications in Medicine (Gene Therapy) ×2 new · Biotechnological Applications in Medicine (Molecular Diagnosis) ×2 new · Biotechnological Applications in Medicine (Recombinant Insulin -… · Biotechnological Applications in Agriculture (Introduction) new · Biotechnological Applications in Agriculture (Green Revolution) new

• Biomolecules

  6same

  Primary and Secondary Metabolites (Examples and Function) ×2 · Proteins (Structure of Proteins) new · Nature of Bond Linking Monomers in Polymer (Glycosidic,… · Lipids (Glycerol and Fatty Acid) new · Nature of Bond Linking Monomers in Polymer (Peptide Bond) new

• Locomotion and Movement

  5+4

  Disorder of Muscular and Skeletal System new · Mechanism of Muscle Contraction (Sliding Filament Theory of Muscle… new · Skeletal System (Appendicular Skeleton) · Skeletal System (Axial skeleton) new · Types of Muscle (Smooth Muscle) new

• Evolution

  4same

  Convergent and Divergent Evolution · Adaptive Radiation (Convergence and Divergence) new · Hardy-Weinberg Principle (Introduction) new · Evidences for Evolution (Biogeographical Evidences) new

• Reproductive Health

  4+2

  Birth Control (IUDS) ×2 new · Birth Control (Barrier Methods) new · Birth Control (Sterilisation Procedure) new

• Structural Organisation in Animals (Animal Tissues)

  4+1

  Cockroach - Anatomy (Digestive System) new · Earthworm - Anatomy (Sensory system) new · Earthworm (Habits and Morphology) new · Epithelial Tissue (Cell-cell communication junctions) new

• Breathing and Exchange of Gases

  3+1

  Exchange of Gases (O₂ and CO₂) (Atm pO₂ and pCO₂, Alveoli, etc.) ×2 new · Disorders of Respiratory System new

• Human Reproduction

  3same

  Fertilisation (Mechanism of Fertilisation, Significance of Fertili…) new · Parturition (Foetal Ejection Reflex, Dilation and Expulsion Stage) new · Pregnancy/Gestation (Gestation Period/Trimesters) new

• Body Fluids and Circulation

  2same

  Coagulation of Blood new · Blood Groups (Abo Blood Groups) new

• Digestion and Absorption

  2same

  Digestive System (Introduction, Food and its Component, etc.) new · Digestion of Food (Role of Pancreatic Juice, Succus Entericus, etc.) new

• Human Health and Disease

  2-1

  Common Diseases in Humans (Typhoid, Pneumonia, etc.) · Common Diseases in Humans (Disease Causing Organism) new

• Excretory Products and their Elimination

  1-1

  Regulation of Kidney Function - Kidney (JGA, RAAS System) new

What changed from NEET 2020

• Biggest rise: Animal Kingdom went from 4 to 12 questions.
• Biggest drop: Chemical Coordination and Integration went from 2 to 0 questions.

Zoology topics asked for the first time in NEET 2021

1. 1Polymerase Chain Reaction (Denaturation, Annealing, etc.) · Biotechnology - Principles and Processes · Zoology3 Qs
2. 2Classification of Animals (Non Chordata) (Characteristic Feature and Examples… · Animal Kingdom · Zoology2 Qs
3. 3Classification of Animals (Non Chordata) (Characteristic Feature and Examples… · Animal Kingdom · Zoology2 Qs
4. 4Biotechnological Applications in Medicine (Gene Therapy) · Biotechnology and its Applications · Zoology2 Qs
5. 5Biotechnological Applications in Medicine (Molecular Diagnosis) · Biotechnology and its Applications · Zoology2 Qs
6. 6Birth Control (IUDS) · Reproductive Health · Zoology2 Qs
7. 7Exchange of Gases (O₂ and CO₂) (Atm pO₂ and pCO₂, Alveoli, etc.) · Breathing and Exchange of Gases · Zoology2 Qs
8. 8Classification of Chordata (Characteristic Feature and Examples - Class Aves) · Animal Kingdom · Zoology1 Qs
9. 9Classification of Animals (Non Chordata) (Characteristic Feature and Examples… · Animal Kingdom · Zoology1 Qs
10. 10Classification of Animals (Non Chordata) (Characteristic Feature and Examples… · Animal Kingdom · Zoology1 Qs

Zoology chapters with no question in NEET 2021

Chemical Coordination and Integration, Neural Control and Coordination

Zoology across the 8 papers

NEET 2021 in the other subjects

Frequently asked questions

Counts come from Edurack's tagged set of NEET papers 2020–2026 (including Re-NEET 2026), mapped to NCERT chapters and topics. Use them as a trend guide — past frequency doesn't guarantee what a future paper will ask. Counts cover 2020–2026.