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Previous year question hub

Life Sciences Previous Year Questions

Practice Life Sciences previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

20Papers
20Years
2,179Questions
49Topics

Life Sciences question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Life Sciences. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 1,250 57.4%
Medium 899 41.3%
Hard 30 1.4%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

MCQ 1,699 78%
Numerical Answer Type (NAT) 299 13.7%
MSQ 176 8.1%
Fill in the blanks 5 0.2%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
2179 Qs

Most asked topics

Top topics across the included previous year papers.

Biochemistry and Molecular Biology
261 Qs
Analytical Techniques
154 Qs
Plant Physiology and Biochemistry
87 Qs
Genetics
84 Qs
Structure-Reactivity Correlations and Organic Reaction Mechanisms
81 Qs
Food Engineering
78 Qs
Animal Anatomy and Physiology
71 Qs
Food Chemistry and Nutrition
70 Qs
Cell Structure and Function
69 Qs
Microbial Growth
68 Qs
Parasitology and Immunology
66 Qs
Enzymes and General Principles of Metabolism
66 Qs
Gene Expression and Its Regulation, and DNA Repair
63 Qs
Genetics and Genomics
52 Qs
Plant Breeding, Genetic Modification, Genome Editing
45 Qs
Cell Biology
43 Qs
Structure and Bonding
42 Qs
Chemical Equilibria
42 Qs
Plant Anatomy
40 Qs
Ecology
40 Qs
s, p and d Block Elements
34 Qs
Thermodynamics
34 Qs
Microbial Diseases and Host Pathogen Interaction
34 Qs
Economic and Applied Botany
31 Qs
Atomic Structure and Periodicity
30 Qs
Food Products Technology
30 Qs
Development Biology
30 Qs
Microbial Taxonomy and Diversity
28 Qs
Control of Micro-organisms: Chemotherapy/Antibiotics
28 Qs
Animal Diversity
28 Qs
Food Microbiology
28 Qs
Microbial Metabolism
27 Qs
Methods in Microbiology
26 Qs
Evolution
26 Qs
Microbial Genetics
24 Qs
Plant Pathology
23 Qs
Reaction Kinetics
23 Qs
Animal Behaviour
23 Qs
Structure and Function of Biomolecules
21 Qs
Plant Systematics
20 Qs
Prokaryotic Cells: Structure and Function
18 Qs
Electrochemistry
17 Qs
Microbial Ecology
14 Qs
Metabolic Pathways and Associated Disorders
14 Qs
Historical Perspective
13 Qs
Plant development; Cell and Tissue Morphogenesis
11 Qs
Ecology and Environment
10 Qs
Chemistry of Biomolecules
6 Qs
Bioinorganic Chemistry
6 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Biomolecules and Molecular Information Flow
173 Qs
Metabolism, Enzymes and Hormones
88 Qs
Inheritance and Genetic Mapping
76 Qs
Comparative Anatomy and Organ-system Physiology
71 Qs
Spectroscopy and Molecular Analysis
67 Qs
Enzyme Catalysis, Kinetics and Regulation
64 Qs
Buffers, Separation and Electrophoresis
62 Qs
Growth Kinetics and Culture Systems
60 Qs
Cellular and Humoral Immunity
51 Qs
Organelles, Membranes and Transport
46 Qs
Substitution, Elimination and Addition Reactions
45 Qs
Genome Organization, Mutations and Epigenetics
43 Qs
Photosynthesis, Respiration and Nitrogen Metabolism
42 Qs
Chemical Bonding and Molecular Structure
39 Qs
Ecosystems, Populations and Biogeography
37 Qs
Infectious Diseases and Pathogenicity
34 Qs
DNA Repair and Gene Regulation
32 Qs
Electronic Effects, Stereochemistry and Aromaticity
31 Qs
Replication, Transcription and Translation
31 Qs
Plant Cells, Tissues and Organ Anatomy
30 Qs
Ionic Equilibria, Buffers and Solubility
29 Qs
Plant Biomolecules, Secondary Metabolites and Hormones
28 Qs
Animal Classification and Phylogenetics
28 Qs
Economic and Medicinal Plants
26 Qs
Origin of Life, Natural Selection and Speciation
26 Qs
Immunological Techniques and Flow Cytometry
25 Qs
Gene Transfer and Genome Editing
25 Qs
Antimicrobial Mechanisms and Resistance
25 Qs
Transition Elements and Coordination Complexes
22 Qs
Microbial Groups and Viral Classification
22 Qs
Cell Cycle, Division and Chromatin
22 Qs
Reaction Rates and Rate Laws
22 Qs
Cell Signalling and Receptors
21 Qs
Cell Structure, Organelles and Microscopy
21 Qs
Atomic Models and Electronic Configuration
20 Qs
Culture, Nutrition and Sterilization Methods
20 Qs
Mass and Energy Balances
20 Qs
Thermodynamic Laws and Thermochemistry
19 Qs
Behaviour, Learning and Communication
19 Qs
Differentiation, Organogenesis and Stem Cells
18 Qs
Fermentation, Respiration and Photosynthesis
18 Qs
Conductance and Electrochemical Cells
17 Qs
Plant Tissue Culture and Regeneration
17 Qs
Momentum Transfer
17 Qs
Plant Diseases and Control
17 Qs
Entropy, Free Energy and Spontaneity
15 Qs
Host-parasite Relations
15 Qs
Protein Structure, Folding and Function
15 Qs
Microbial Interactions and Biogeochemical Cycles
14 Qs
Fermented Foods and Beverages
13 Qs
Microbiology Discoveries and Germ Theory
13 Qs
Food Component Characterization
13 Qs
Main-group Compounds
12 Qs
Lipids
12 Qs
Mutation, DNA Repair and Gene Transfer
12 Qs
Gametogenesis and Embryonic Development
12 Qs
Mechanical Operations
12 Qs
Processing Principles
12 Qs
Heat transfer
12 Qs
Central Carbon and Lipid Metabolism
11 Qs
Meristems, Vascular Systems and Secondary Growth
10 Qs
Plant Classification and Nomenclature
10 Qs
Cell Envelopes and Membrane Transport
10 Qs
Periodic Properties
10 Qs
Thermal operations
10 Qs
Plant Families and Diversity
9 Qs
Proteins
9 Qs
Water Relations and Mineral Transport
9 Qs
Pollution, Climate Change and Conservation
8 Qs
Environmental Responses, Quorum Sensing and Biofilms
8 Qs
Colligative Properties
8 Qs
Surface Structures, Inclusions and Motility
8 Qs
Stress Physiology and Senescence
8 Qs
Inheritance, Recombination and Genetic Mapping
8 Qs
Carbohydrates
8 Qs
Population Genetics and Genetic Disorders
8 Qs
Chemical and Biochemical Changes
7 Qs
Characteristics of Microorganisms
7 Qs
Food packaging and storage
7 Qs
Major Biomolecules and Organization of Life
6 Qs
Gene Regulation and Microbial Genomes
6 Qs
Microscopy and Molecular Diagnosis
6 Qs
Phage and Viral Genetics
6 Qs
Bioenergetics and Central Metabolic Pathways
6 Qs
Molecular Taxonomy and Phylogeny
6 Qs
Food Flavours
6 Qs
Biomolecular Structure and Sequencing
6 Qs
Plant-pathogen Interactions and Defence Signalling
6 Qs
Applied Plant Biotechnology and Phytochemicals
5 Qs
Organic Reagents and Functional-group Tests
5 Qs
Homogeneous Reaction Equilibria
5 Qs
Mass Transfer
5 Qs
Tissue Patterning and Meristem Development
5 Qs
Pigments
5 Qs
Food Adulteration and Detection
5 Qs
Metalloenzymes
5 Qs
Nutrition
5 Qs
Courtship, Territoriality and Social Behaviour
4 Qs
Intermolecular Forces and Ionic Solids
3 Qs
Breeding, Selection and Molecular Markers
3 Qs
Gametophytes, Fertilization and Seed Development
3 Qs
Antifungal and Antiviral Drugs
3 Qs
Flowering, Light and Hormonal Regulation
3 Qs
Microbial Growth
3 Qs
Biosynthesis and Metabolic Regulation
3 Qs
Food Spoilage
3 Qs
Conservation, Biodiversity and Ecotoxicology
3 Qs
Food standards and Quality Maintenance
3 Qs
Cereal and Pulse Processing
3 Qs
Fruits and Vegetables Processing
2 Qs
Coenzymes, ATP and Metabolic Regulation
2 Qs
Metabolic Disorders
2 Qs
Ecosystems, Vegetation and Biogeography
2 Qs
Protein Targeting and Degradation
2 Qs
Humidification and Dehumidification
2 Qs
Functional Genomics and Omics Analysis
1 Qs
Probiotic foods
1 Qs
Catalysis and Enzyme Inhibition
1 Qs
Toxins from Microbes
1 Qs
Nitrogen Metabolism
1 Qs
Phylogenetics and Molecular Taxonomy
1 Qs
Metalloproteins in Oxygen and Electron Transport
1 Qs
Non thermal technologies
1 Qs
Oil Processing
1 Qs
Processing of animal products
1 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Life Sciences (XL) 2026
109 Qs
Life Sciences (XL) 2025
109 Qs
Life Sciences (XL) 2024
112 Qs
Life Sciences (XL) 2023
112 Qs
Life Sciences (XL) 2022
65 Qs
Life Sciences (XL) 2021
115 Qs
Life Sciences (XL) 2020
105 Qs
Life Sciences (XL) 2019
105 Qs
Life Sciences (XL) 2018
104 Qs
Life Sciences (XL) 2017
114 Qs
Life Sciences (XL) 2016
114 Qs
Life Sciences (XL) 2015
47 Qs
Life Sciences (XL) 2014
120 Qs
Life Sciences (XL) 2013
117 Qs
Life Sciences (XL) 2012
109 Qs
Life Sciences (XL) 2011
120 Qs
Life Sciences (XL) 2010
105 Qs
Life Sciences (XL) 2009
117 Qs
Life Sciences (XL) 2008
112 Qs
Life Sciences (XL) 2007
168 Qs

Browse by topics

Open a focused page built from the same verified paper data.

Biochemistry and Molecular Biology

Explore previous-paper coverage, trends and focused practice for Biochemistry and Molecular Biology.

261 questions20 papers20 years

Analytical Techniques

Explore previous-paper coverage, trends and focused practice for Analytical Techniques.

154 questions20 papers20 years

Plant Physiology and Biochemistry

Explore previous-paper coverage, trends and focused practice for Plant Physiology and Biochemistry.

87 questions20 papers20 years

Genetics

Explore previous-paper coverage, trends and focused practice for Genetics.

84 questions20 papers20 years

Structure-Reactivity Correlations and Organic Reaction Mechanisms

Explore previous-paper coverage, trends and focused practice for Structure-Reactivity Correlations and Organic Reaction Mechanisms.

81 questions19 papers19 years

Food Engineering

Explore previous-paper coverage, trends and focused practice for Food Engineering.

78 questions18 papers18 years

Animal Anatomy and Physiology

Explore previous-paper coverage, trends and focused practice for Animal Anatomy and Physiology.

71 questions20 papers20 years

Food Chemistry and Nutrition

Explore previous-paper coverage, trends and focused practice for Food Chemistry and Nutrition.

70 questions16 papers16 years

Cell Structure and Function

Explore previous-paper coverage, trends and focused practice for Cell Structure and Function.

69 questions19 papers19 years

Microbial Growth

Explore previous-paper coverage, trends and focused practice for Microbial Growth.

68 questions19 papers19 years

Parasitology and Immunology

Explore previous-paper coverage, trends and focused practice for Parasitology and Immunology.

66 questions20 papers20 years

Enzymes and General Principles of Metabolism

Explore previous-paper coverage, trends and focused practice for Enzymes and General Principles of Metabolism.

66 questions19 papers19 years

Gene Expression and Its Regulation, and DNA Repair

Explore previous-paper coverage, trends and focused practice for Gene Expression and Its Regulation, and DNA Repair.

63 questions20 papers20 years

Genetics and Genomics

Explore previous-paper coverage, trends and focused practice for Genetics and Genomics.

52 questions18 papers18 years

Plant Breeding, Genetic Modification, Genome Editing

Explore previous-paper coverage, trends and focused practice for Plant Breeding, Genetic Modification, Genome Editing.

45 questions16 papers16 years

Cell Biology

Explore previous-paper coverage, trends and focused practice for Cell Biology.

43 questions20 papers20 years

Structure and Bonding

Explore previous-paper coverage, trends and focused practice for Structure and Bonding.

42 questions19 papers19 years

Chemical Equilibria

Explore previous-paper coverage, trends and focused practice for Chemical Equilibria.

42 questions18 papers18 years

Plant Anatomy

Explore previous-paper coverage, trends and focused practice for Plant Anatomy.

40 questions19 papers19 years

Ecology

Explore previous-paper coverage, trends and focused practice for Ecology.

40 questions19 papers19 years

s, p and d Block Elements

Explore previous-paper coverage, trends and focused practice for s, p and d Block Elements.

34 questions16 papers16 years

Thermodynamics

Explore previous-paper coverage, trends and focused practice for Thermodynamics.

34 questions19 papers19 years

Microbial Diseases and Host Pathogen Interaction

Explore previous-paper coverage, trends and focused practice for Microbial Diseases and Host Pathogen Interaction.

34 questions15 papers15 years

Economic and Applied Botany

Explore previous-paper coverage, trends and focused practice for Economic and Applied Botany.

31 questions17 papers17 years

Atomic Structure and Periodicity

Explore previous-paper coverage, trends and focused practice for Atomic Structure and Periodicity.

30 questions17 papers17 years

Food Products Technology

Explore previous-paper coverage, trends and focused practice for Food Products Technology.

30 questions15 papers15 years

Development Biology

Explore previous-paper coverage, trends and focused practice for Development Biology.

30 questions16 papers16 years

Microbial Taxonomy and Diversity

Explore previous-paper coverage, trends and focused practice for Microbial Taxonomy and Diversity.

28 questions14 papers14 years

Control of Micro-organisms: Chemotherapy/Antibiotics

Explore previous-paper coverage, trends and focused practice for Control of Micro-organisms: Chemotherapy/Antibiotics.

28 questions17 papers17 years

Animal Diversity

Explore previous-paper coverage, trends and focused practice for Animal Diversity.

28 questions16 papers16 years

Food Microbiology

Explore previous-paper coverage, trends and focused practice for Food Microbiology.

28 questions14 papers14 years

Microbial Metabolism

Explore previous-paper coverage, trends and focused practice for Microbial Metabolism.

27 questions11 papers11 years

Methods in Microbiology

Explore previous-paper coverage, trends and focused practice for Methods in Microbiology.

26 questions14 papers14 years

Evolution

Explore previous-paper coverage, trends and focused practice for Evolution.

26 questions13 papers13 years

Microbial Genetics

Explore previous-paper coverage, trends and focused practice for Microbial Genetics.

24 questions13 papers13 years

Plant Pathology

Explore previous-paper coverage, trends and focused practice for Plant Pathology.

23 questions15 papers15 years

Reaction Kinetics

Explore previous-paper coverage, trends and focused practice for Reaction Kinetics.

23 questions17 papers17 years

Animal Behaviour

Explore previous-paper coverage, trends and focused practice for Animal Behaviour.

23 questions16 papers16 years

Structure and Function of Biomolecules

Explore previous-paper coverage, trends and focused practice for Structure and Function of Biomolecules.

21 questions12 papers12 years

Plant Systematics

Explore previous-paper coverage, trends and focused practice for Plant Systematics.

20 questions15 papers15 years

Prokaryotic Cells: Structure and Function

Explore previous-paper coverage, trends and focused practice for Prokaryotic Cells: Structure and Function.

18 questions10 papers10 years

Electrochemistry

Explore previous-paper coverage, trends and focused practice for Electrochemistry.

17 questions15 papers15 years

Microbial Ecology

Explore previous-paper coverage, trends and focused practice for Microbial Ecology.

14 questions11 papers11 years

Metabolic Pathways and Associated Disorders

Explore previous-paper coverage, trends and focused practice for Metabolic Pathways and Associated Disorders.

14 questions13 papers13 years

Historical Perspective

Explore previous-paper coverage, trends and focused practice for Historical Perspective.

13 questions12 papers12 years

Plant development; Cell and Tissue Morphogenesis

Explore previous-paper coverage, trends and focused practice for Plant development; Cell and Tissue Morphogenesis.

11 questions7 papers7 years

Ecology and Environment

Explore previous-paper coverage, trends and focused practice for Ecology and Environment.

10 questions7 papers7 years

Chemistry of Biomolecules

Explore previous-paper coverage, trends and focused practice for Chemistry of Biomolecules.

6 questions3 papers3 years

Bioinorganic Chemistry

Explore previous-paper coverage, trends and focused practice for Bioinorganic Chemistry.

6 questions5 papers5 years

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
Life Sciences (XL) 20262026109View paper
Life Sciences (XL) 20252025109View paper
Life Sciences (XL) 20242024112View paper
Life Sciences (XL) 20232023112View paper
Life Sciences (XL) 2022202265View paper
Life Sciences (XL) 20212021115View paper
Life Sciences (XL) 20202020105View paper
Life Sciences (XL) 20192019105View paper
Life Sciences (XL) 20182018104View paper
Life Sciences (XL) 20172017114View paper
Life Sciences (XL) 20162016114View paper
Life Sciences (XL) 2015201547View paper
Life Sciences (XL) 20142014120View paper
Life Sciences (XL) 20132013117View paper
Life Sciences (XL) 20122012109View paper
Life Sciences (XL) 20112011120View paper
Life Sciences (XL) 20102010105View paper
Life Sciences (XL) 20092009117View paper
Life Sciences (XL) 20082008112View paper
Life Sciences (XL) 20072007168View paper

Sample previous year questions

A varied preview from the papers represented in this selection, with every available option.

1
2007 · Life Sciences · Structure and Bonding · Chemical Bonding and Molecular Structure
Life Sciences (XL) 2007
On the basis of VSEPR theory, the molecule which has a linear structure is

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2
2008 · Life Sciences · Structure and Bonding · Chemical Bonding and Molecular Structure
Life Sciences (XL) 2008

Which of the following will NOT conduct electricity?

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3
2009 · Life Sciences · Reaction Kinetics · Reaction Rates and Rate Laws
Life Sciences (XL) 2009
For a second order reaction, \( R \xrightarrow{k} P \), the relation between half-life time ( \( t_{1/2} \) ) and the initial reactant concentration [\( R_0 \)] is
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4
2010 · Life Sciences · Animal Behaviour · Behaviour, Learning and Communication
Life Sciences (XL) 2010
The question below consists of a pair of related words followed by four pairs of words. Select the pair that best expresses the relation in the original pair.
Unemployed : Worker

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5
2011 · Life Sciences · Analytical Techniques · Buffers, Separation and Electrophoresis
Life Sciences (XL) 2011
The question below consists of a pair of related words followed by four pairs of words. Select the pair that best expresses the relation in the original pair.
Gladiator : Arena
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6
2012 · Life Sciences · Electrochemistry · Conductance and Electrochemical Cells
Life Sciences (XL) 2012
The value of standard half cell potential of Cu2+, Cu couple (E°Cu2+, Cu) is 0.34 V. A wire of pure copper is immersed into a solution of copper nitrate. If the measured cell potential against standard hydrogen electrode at 298 K is 0.24 V, the molar concentration of copper nitrate is {Assume activity of Cu2+ = [Cu2+]}.
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