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Indian National Biology Olympiad
- INBO 2026
  - Theory
    
    Leaderboard - Theory
    
    Q1 - Protein Tertiary Structure Interactions
    
    Q10 - Rigor Mortis and ATP Depletion
    
    Q11 - Homeotherm Heat Production and Loss
    
    Q12 - Bat Kidney Morphology and Diet
    
    Q13 - lac Operon Regulation (Glucose and Lactose)
    
    Q14 - Cytogenetic Analysis of Sex Chromosome Abnormalities
    
    Q15 - Food Hoarding vs Fat Storage Under Uncertainty
    
    Q16 - Navigation in Migratory Animals
    
    Q17 - Global Hydrological Cycle Turnover Times
    
    Q18 - Carbon Cycle Flux Ranking
    
    Q19 - Speckled Wood Butterfly Territorial Strategy
    
    Q2 - Plasmid Processing Enzyme (Gel Electrophoresis)
    
    Q20 - Migration Cost Minimization Strategies
    
    Q21 - Convergent Evolution in Desert Plants
    
    Q22 - Cladogram Group Classification
    
    Q23 - Gene Size, Introns and mRNA Analysis
    
    Q24 - Transcription Factor Activation Pathway
    
    Q25 - Degenerate Oligonucleotide Probe Design
    
    Q26 - Protein Molecules in a Hepatocyte
    
    Q27 - Restriction Enzyme Mapping
    
    Q28 - Gaucher Disease GCase Mutation Analysis
    
    Q29 - Proteolytic Enzyme Substrate Specificity
    
    Q3 - Membrane Fluidity and Gel-to-Fluid Transition
    
    Q30 - Plant Biomolecular Composition Matching
    
    Q31 - Plant Cell Water Potential Components
    
    Q32 - Thermal Acclimation and Photosynthesis in Arctic Plants
    
    Q33 - Plant Photosynthetic Temperature Response
    
    Q34 - Auxin-Mediated Phototropism Experiments
    
    Q35 - Calvin Cycle Intermediate Stoichiometry
    
    Q36 - Mammalian Vision: Skull Morphology and Retinal Composition
    
    Q37 - Nernst Equation Membrane Potential
    
    Q38 - Corticotropin Releasing Hormone in Pregnancy and Amphibian Development
    
    Q39 - Enterocyte Ion Transport and Oral Rehydration
    
    Q4 - Conformational Entropy and Free Energy
    
    Q40 - Organ Weight-Specific Basal Metabolic Rate
    
    Q41 - Bohr and Haldane Effects in Fetal-Maternal Gas Exchange
    
    Q42 - Parthenogenesis in Whiptail Lizards
    
    Q43 - Polygenic Inheritance of Plant Height
    
    Q44 - RFLP Pedigree Analysis
    
    Q45 - Multiple Alleles in Mallard Duck Plumage
    
    Q46 - Epistatic Coat Color in Rodents
    
    Q47 - X-linked Lesch-Nyhan Syndrome Probability
    
    Q48 - Genetic Drift Simulation in Small Populations
    
    Q49 - Types of Natural Selection on Allele Frequency
    
    Q5 - Suppressor tRNA and Stop Codon Readthrough
    
    Q50 - Tropical Seedling Shade Tolerance
    
    Q51 - Risk-Sensitive Foraging Under Energy Stress
    
    Q52 - Leaf Solar Tracking and Radiation
    
    Q53 - American Redstart Song Modes and Pairing
    
    Q54 - Island vs Mainland Hare Population Dynamics
    
    Q55 - Digger Bee Alternative Mating Strategies
    
    Q56 - Cichlid Fish Agonistic Behavior and Weight Asymmetry
    
    Q57 - Adaptive Significance of Bird Behavioral Traits
    
    Q58 - Mollusc Clade Feature Identification
    
    Q59 - Animal Phylogeny Evolutionary Traits
    
    Q6 - Gibberellic Acid and Light Effects on Hypocotyl Growth
    
    Q7 - Apical Dominance and Auxiliary Bud Dormancy
    
    Q9 - Phloem Sap Exudation and Light Dependence
    
    Timed Attempt - Theory
International Biology Olympiad
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Taiwanese Biology Olympiad
- TBO 2023

Indian National Biology Olympiad

National

India's second-stage biology olympiad selection, run by HBCSE under NCERT. Qualifiers from NSEB sit for this theory paper; top scorers advance to OCSC and then to IBO.

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