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UPSC Zoology Syllabus 2024- Detailed Zoology Syllabus for Paper 1 & 2

UPSC Zoology Syllabus 2024- Detailed Zoology Syllabus for Paper 1 & 2

Edited By Vishnukumar | Updated on Feb 14, 2024 06:08 PM IST | #UPSC CSE

By referring the UPSC Zoology 2024 syllabus pdf, candidates can prepare their study schedule and exam preparation strategy. Union Public Service Commission prescribes the UPSC zoology syllabus in an official notification pdf. The syllabus of UPSC IAS for zoology is released separately for paper 1 and paper 2 in the pdf file.
Download - UPSC Zoology syllabus pdf

Aspirants should refer the UPSC zoology 2024 syllabus for the mains exam of UPSC IAS. It becomes important to cover the syllabus in detail as UPSC IAS question papers are prepared from it only. Go to the below-given article to know about the Civil Services exam and other important details of the zoology syllabus.

Highlights of Zoology Syllabus 2024

  • According to UPSC IAS 2024 exam pattern there will be no negative marking in mains exam.

  • This syllabus will be useful only to those applicants who qualify in the UPSC IAS 2024 result.

  • The syllabus of zoology subject is divided in two parts - paper I and II

  • The weightage of both the papers in the exam is the same which is 250 marks.

UPSC Subject-wise Questions for various Subjects

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UPSC Zoology Paper I Syllabus 2024

Applicants can check various topics and sub topics of Zoology subjects from the given table below.

UPSC Zoology Paper 1 syllabus


Sub topics


  • Biosphere: concept of biosphere; biomes, Biogeochemical cycles, Human induced changes in atmosphere including greenhouse effect, biomes and ecotones, ecological succession, community ecology.

  • Concept of ecosystem; structure and function of ecosystem, types of ecosystem, ecological succession, ecological adaptation.

  • Population; characteristics, population dynamics, population stabilization.

  • Biodiversity and diversity conservation of natural resources.

  • Wildlife of India.

  • Remote sensing for sustainable development.

  • Environmental biodegradation; pollution and its impact on biosphere and its prevention.

Non-chordata and Chordata

(a) Classification and relationship of various phyla up to subclasses: Acoelomate and Coelomate, Protostomes and Deuterostomes, Bilateria and Radiata; Status of Protista, Parazoa, Onychophora and Hemichordata; Symmetry.

(b) Protozoa: Locomotion, nutrition, reproduction, sex; General features and life history of Paramaecium, Monocystis. Plasmodium and Leishmania.

(c) Porifera: Skeleton, canal system and reproduction.

(d) Cnidaria: Polymorphism, defensive structures and their mechanism; coral reefs and their formation; metagenesis; general features and life history of Obelia and Aurelia.

(e) Platyhelminthes: Parasitic adaptation; general features and life history of Fasciola and Taenia and their-Pathogenic symptoms. (f) Nemathelminthes: General features, life history, parasitic adaptation of Ascaris and Wuchereria.

(g) Annelida: Coelom and metamerism; modes of life in polychaetes; general features and life history of Nereis, earthworm and leech.

(h) Arthropoda: Larval forms and parasitism in Crustacea; vision and respiration in arthropods (Prawn, scorpion & cockroach); modification of mouth, parts in insects (cockroach, housefly, mosquito, honey bee and butterfly), metaphor phosis in insect and its hormonal regulation, social behaviour ofApis and termites.

(i) Molluscs: Feeding, respiration, locomotion, general features and life history of Lamellidens, Pila and Sepia. Torsion and detorsion in gastropods.

(j) Echinodermata: Feeding, respiration, locomotion, larval forms, general features and life history of Asterias.

(k) Protochordata: Origin of chordates; general features and life history of Branchiostoma and Herdmania.

(l) Pisces: Respiration, locomotion and migration.

(m) Amphibia: Origin of tetrapods, parental care, paedomorphosis.

(n) Reptilia; Origin of reptiles, skull types, status of Sphenodon and crocodiles.

(o) Aves: Origin of birds, flight adaptation, migration.

(p) Mammalia: Origin of mammals, dentition, general features of egg laying mammals, pouched mammals, aquatic mammals and primates, endocrine glands (pituitary, thyroid, parathyroid, adrenal, pancreas, gonads) and their interrelationships.

(q) Comparative functional anatomy of various systems of vertebrates. (integument and its derivatives, endoskeleton, locomotory organs, digestive system,. respiratory system, circulatory system including heart and aortic arches, urinogenital system, brain and sense organs (eye & ear).


(1) Behaviour: Sensory filtering, responsiveness, sign stimuli, learning, and memory, instinct, habituation, conditioning, imprinting.

(2) Role of hormones in drive; role of pheromones in alarm spreading; crypsis, predator detection, predator tactics, social hierarchies in primates, social organization in insects;

(3) Orientation, navigation, homing; biological rhythms: biological clock, tidal, seasonal and circadian rhythms.

(4) Methods of studying animal behaviour including sexual conflict, selfishness, kinship and altruism.


  • Designing of experiments.

  • Null hypothesis

  • Correlation

  • Regression

  • Distribution and measure of central tendency

  • Chi square

  • Student-test

  • F-test (one-way & two-way F-test).

Instrumentation methods

(a) Spectrophotometer, phase contrast & fluorescence microscopy, radioactive tracer, electrophoresis, ultracentrifuge, PCR, ELISA, FISH and chromosome painting.

(b) Electron microscopy (TEM, SEM).

Economic Zoology

(a) Apiculture, sericulture, lac culture, pearl culture, carp culture, prawn culture, vermiculture.

(b) Major infectious and communicable diseases (malaria,tuberculosis, filaria, cholera and AIDS) their vectors, pathogens and prevention.

(c) Cattle and livestock diseases, their pathogen (helminths) and vectors (ticks, mites, Tabanus, Stomoxys).

(d) Pests of sugarcane (Pyrilla perpusilla), oil seed (Achaeajanata) and rice (Sitophilus oryzae).

(e) Transgenic animals.

(f) Medical biotechnology, human genetic disease and genetic counselling, gene therapy.

(g) Forensic biotechnology.

UPSC Zoology 2024 Paper 2 syllabus


Sub topics


  • Theories of origin of life.

  • Theories of evolution; Natural selection, role of mutation in evolution, evolutionary patterns, molecular drive, mimicry, variation, isolation and speciation.

  • Evolution of horse, elephant and man using fossil data.

  • Continental drift and distribution of animals.

  • Hardy-Weinberg Law.


Zoological nomenclature

International code


Molecular taxonomy & biodiversity

Cell Biology

(a) Structure & function of cell and its organelles (nucleus, plasma membrane, mitochondria, Golgi bodies, endoplasmic reticulum, ribosomes and lysosomes), cell division (mitosis and meiosis), mitotic spindle and mitotic apparatus, chromosome movement chromosome type polytene and lampbrush, organization of chromatin, heterochromatin, Cell cycle regulation.

(b) Nucleic acid topology, DNA replication, transcription, DNA motif, RNA processing, translation, protein foldings and transport.


(a) Modern concept of gene, split gene, genetic,genetic regulation, code.

(b) Sex chromosomes and their evolution, sex determination in Drosophila and man.

(c) Mendel’s laws of inheritance, recombination, linkage, multiple alleles, genetics of blood groups, pedigree analysis, hereditary diseases in man.

(d) Mutations and mutagenesis.

(e) Recombinant DNA technology, plasmid, cosmid, artificial chromosomes as vectors, transgenics, DNA cloning and whole animal cloning (principles and methods).

(f) Gene regulation and expression in prokaryotes and eukaryotes.

(g) Signal molecules, cell death, defects in signaling pathway and consequences.

(h) RFLP, RAPD and AFLP and application of RFLP in DNA finger-printing, ribozyme technologies, human genome project, genomics and proteomics.


(a) Structure and role of carbohydrates, fats, fatty acids, cholesterol, proteins and amino-acids, nucleic acids. Bioenergetics.

(b) Glycolysis and Krebs cycle, oxidation and reduction, oxidative phosphorylation; energy conservation and release, ATP, cycl cyclic AMP-its structure and role.

(c) Hormone classification (steroid and peptide hormones), biosynthesis and functions.

(d) Enzymes: types and mechanisms of action.

(e) Vitamins and coenzymes.

(f) Immunoglobulin and immunity.

Physiology (with special reference to mammals)

  • Composition and constituents of blood; blood groups and Rh factor in man; factors and mechanism of coagulation; iron metabolism, acid-base balance, thermoregulation, anticoagulants.

  • Haemoglobin: Composition, types and role in transport of oxygen and carbon dioxide.

  • Digestion and absorption: Role of salivary glands, liver, pancreas and intestinal glands.

  • Excretion: nephron and regulation of urine formation; osmo-regulation and excretory product.

  • Muscles: Types, mechanism of contraction of skeletal muscles, effects of exercise on muscles.

  • Neuron: nerve impulse—its conduction and synaptic transmission; neurotransmitters.

  • Vision, hearing and olfaction in man.

  • Physiology of reproduction, puberty and menopause in humans.

Developmental Biology

(a) Gametogenesis; spermatogenesis, composition of semen, in vitro and in vivo capacitation of mammalian sperm, Oogenesis, totipotency; fertilization, morphogenesis and morphogen; blastogenesis, establishment of body axes formation, fate map, gastrulation in frog and chick; genes in development in chick homeotic genes, development of eye and heart, placenta in mammals.

(b) Cell lineage, cell to cell interaction, Genetic and induced teratogenesis, role of thyroxine in control of metamorphosis in amphibia, paedogenesis and neoteny, cell death, aging.

(c) Developmental genes in man, in vitro fertilization; and embryo transfer; cloning.

(d) Stem cells: Sources, types and their use in human welfare.

(e) Biogenetic law.

Also read: UPSC Mock Tests Series for UPSC

UPSC CSE Exam Pattern 2024 - For Prelims & Mains Exam

As per the official UPSC Civil Services Exam notification, the UPSC IAS prelims exam has multiple choice questions whereas the UPSC IAS mains exam is descriptive type questions. The prelims CSE is of 400 marks in total whereas IAS mains is of 2350 marks. For more details on the prelims and mains UPSC IAS exam pattern 2024 check the tables below.

UPSC IAS prelims exam pattern





Paper 1

General Studies 1


2 hrs

Paper 2

General Studies 2


2 hrs

UPSC CSE mains exam pattern





Paper 1

General English


3 hrs

Paper 2

Language (regional language)


3 hrs

Paper 3



3 hrs

Paper 4

General Studies 1


3 hrs

Paper 5

General Studies 2


3 hrs

Paper 6

Optional subject 1


3 hrs

Paper 7

Optional subject 1


3 hrs

Paper 8

Optional subject 2


3 hrs

Paper 9

Optional subject 2


3 hrs

Also read: Information about category-wise career exams

Frequently Asked Question (FAQs)

1. Where can I download the UPSC Civil Services syllabus?

Aspirants can download UPSC IAS syllabus from the official website -

2. When will the commission release the admit card?

The commission will release UPSC IAS admit card in online mode tentatively by 20 days prior to the exam.

3. What is the use of UPSC CSE zoology syllabus?

Applicants have to prepare for the zoology subject syllabus to qualify Civil Services mains examination.

4. What is the UPSC IAS salary?

Applicants should know that UPSC IAS salary basic pay is Rs. 56,100


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Questions related to UPSC CSE

Have a question related to UPSC CSE ?

It's great that you are taking the initiative to pursue your dream of becoming an IAS officer, Bettaswamy. Many working professionals like you crack the UPSC exam every year.

Anxiety often stems from dwelling on uncertainties. Instead, focus on what you can control – your daily preparation. Break down your study plan into manageable chunks and celebrate small goals. Challenge negative thoughts with realistic and empowering self-talk. Instead of "what if I fail," tell yourself, "I am putting in the effort to succeed, and I am capable of learning from any outcome." Practice relaxation techniques like meditation, deep breathing, or yoga to calm your mind and reduce stress.

Plan your study schedule around your work commitments. Utilize pockets of time for revision and dedicate focused study time during evenings or weekends.

Plan your study schedule around your work commitments. Utilize pockets of time for revision and dedicate focused study time during evenings or weekends.

Connect with other UPSC aspirants or online forums for motivation and sharing strategies. Consider joining a coaching institute that caters to working professionals.

I hope it helps!


I assume you want to know the eligibility criteria to becoming an IAS. First of all, to become an IAS,  one has to clear UPSC CSE examiner. There are certain eligibility criteria for applying in this examination and they are as follows:

  • Bachelor's degree from any recognised college.
  • Age between 21-32; with some relaxation for reserved categories.
  • Citizen of India ora subject of Nepal/ Bhutan or Tibetan refugee who came to India, to permanently settle here before January 1, 1962, or People of Indian origin who migrated from Uganda, Burma, Pakistan, Zambia, the United Republic of Tanzania, Malawi, Sri Lanka, East African Countries of Kenya, Zaire, Ethiopia and Vietnam to permanently settle in India.

For more information, please visit the website by clicking on the link given below:

And other government jobs, the eligibility test is different for different jobs. It would have been if you could mention the government job you are interested in.

Hope this answers your query. Thank you

Dear aspirant !!

Hope you are doing good !

Yes it will be considered because Bachelor in Audiology and Speech-Language Pathology (BASLP) is a 4-year degree course . It is a multi-disciplinary profession with core subjects including speech pathology, language pathology, and audiology.

Hope it helps you ;

Thank you

Dear Aspirant !

Hope you are fine!

The main subjects for the UPSC Exam are Indian Politics, Indian Economy, International Relations, Science and Technology, Geography, History, Environment and Ecology, and related Current Affairs . There are 25 subjects and 23 literature optional that one can choose from in addition to this..

Thank you

Hello aspirant,

With the help of the IAS Answer Key 2024, applicants can estimate their potential score for the IAS preliminary exam, learn about the various IAS question types, gauge the exam's difficulty, and much more.

To get the answer key, you can visit our website by clicking on the link given below.

Thank you

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