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Theoretical B

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Theoretical B Exam + Official Answer Key
Q1 Dichotomous Key Branching & Taxonomic Resolution Taxonomic Keys & IdentificationMedium IBO·2024·Q1 — ptsPDF
Q2 Red Deer mtDNA Phylogeny & Bootstrap Support Molecular SystematicsMedium IBO·2024·Q2 — ptsPDF
Q3 BRCA1/53BP1 and DNA Double-Strand Break Repair Pathway Choice DNA Repair & RecombinationHard IBO·2024·Q3 — ptsPDF
Q4 Calcium Channel Signaling in Pancreatic Beta Cells Cell Signaling & CommunicationMedium IBO·2024·Q4 — ptsPDF
Q5 Ketogenic Diet Metabolism and Catecholamine Seizure Latency Bioenergetics & Central Metabolism OverviewHard IBO·2024·Q5 — ptsPDF
Q6 ProQC, Synthetic Toehold-Switch Quality Control of Translation Recombinant DNA & Biotechnology TechniquesEasy IBO·2024·Q6 — ptsPDF
Q7 DNA Fiber Assay and Replication Fork Progression DNA Structure & ReplicationHard IBO·2024·Q7 — ptsPDF
Q8 Identifying DNA-Metabolism Enzymes from a Gel Assay Biomolecular Analytical TechniquesHard IBO·2024·Q8 — ptsPDF
Q9 Compound X, Polyploidy, and Checkpoint Kinases A/B Cell Cycle, Mitosis & MeiosisMedium IBO·2024·Q9 — ptsPDF
Q10 Heterodimer Formation, Ligand Signaling, and Stem Cell Differentiation Cell Signaling & Communication Gene Regulation: Eukaryotic & EpigeneticsHard IBO·2024·Q10 — ptsPDF
Q11 Proteasome vs. Lysosome Degradation and Protein Half-Life Endomembrane System & Protein TraffickingMedium IBO·2024·Q11 — ptsPDF
Q12 FRET-Based Protease Activity and Inhibitor Mechanism Biomolecular Analytical TechniquesHard IBO·2024·Q12 — ptsPDF
Q13 Shelterin, the T-loop, and Chromosome Bridge Formation DNA Repair & Recombination Cell Cycle, Mitosis & MeiosisHard IBO·2024·Q13 — ptsPDF
Q14 Aral Sea Food-Chain Restoration and Salinity Tolerance EcologyMedium IBO·2024·Q14 — ptsPDF
Q15 Lotka-Volterra Competition Lines and Coexistence Outcomes EcologyHard IBO·2024·Q15 — ptsPDF
Q16 Niche Dimensions and Stipa capillata Drought Adaptation EcologyMedium IBO·2024·Q16 — ptsPDF
Q17 Incompatible Insect Technique and Wolbachia-Induced Cytoplasmic Incompatibility EcologyMedium IBO·2024·Q17 — ptsPDF
Q18 Ant Invasion, Visibility, and a Lion-Zebra-Buffalo Trophic Cascade EcologyMedium IBO·2024·Q18 — ptsPDF
Q19 Heat-Balling Honeybee Defense Against Hornets Foraging & Anti-Predator BehaviorMedium IBO·2024·Q19 — ptsPDF
Q20 Female Body Mass, Male Fighting, and Mating Outcomes in Crickets Mating Systems & Sexual SelectionMedium IBO·2024·Q20 — ptsPDF
Q21 Cannibalism Probability and Injury Bias in Japanese Mitten Crabs Foraging & Anti-Predator BehaviorHard IBO·2024·Q21 — ptsPDF
Q22 Genomic Imprinting at the IGF2-H19 Locus Extranuclear & Non-Mendelian InheritanceHard IBO·2024·Q22 — ptsPDF
Q23 ACE2/CTS1 Mutations and Multicellularity in Yeast Extensions of Mendelian InheritanceMedium IBO·2024·Q23 — ptsPDF
Q24 Robertsonian Translocation and Chromosome 14/21 Anomalies Chromosomal Variation: Number & StructureHard IBO·2024·Q24 — ptsPDF
Q25 X-Linked Trait Allele Mixing and Pedigree Probability Sex Determination & Sex-Linked Inheritance Population Genetics & Hardy-Weinberg EquilibriumHard IBO·2024·Q25 — ptsPDF
Q26 Intratumor Heterogeneity and Clonal Evolution Under Treatment Natural Selection: Modes & FitnessMedium IBO·2024·Q26 — ptsPDF
Q27 PCR Mapping of Genomic Rearrangements in Genes H and K Chromosomal Variation: Number & StructureHard IBO·2024·Q27 — ptsPDF
Q28 Epistasis Between Two Hair-Pigmentation Genes Gene Interactions: Epistasis & Complementation AnalysisHard IBO·2024·Q28 — ptsPDF
Q29 Cas9 Target Sites, Donor Design, and Mutation Severity Recombinant DNA & Biotechnology TechniquesMedium IBO·2024·Q29 — ptsPDF
Q30 Linked Genes Controlling Fruit Fly Wing Pigmentation Linkage, Recombination & Genetic MappingHard IBO·2024·Q30 — ptsPDF
Q31 Linkage Disequilibrium Between M* and Flanking Loci R/Q Linkage, Recombination & Genetic MappingMedium IBO·2024·Q31 — ptsPDF
Q32 Venus Flytrap Closure, Temperature and Chemical Effects Tropisms & Nastic MovementsMedium IBO·2024·Q32 — ptsPDF
Q33 PtrWOX4a and PtrVCS2 in Vascular Cambium Proliferation Secondary Growth & Wood AnatomyMedium IBO·2024·Q33 — ptsPDF
Q34 GAPLESS Proteins and Apoplastic Transport in Roots Root AnatomyMedium IBO·2024·Q34 — ptsPDF
Q35 Phytochrome B States, Temperature, and Nuclear Bodies Photoperiodism, Vernalization & FloweringMedium IBO·2024·Q35 — ptsPDF
Q36 CONSTANS, Photoperiod, and Seed Mass Photoperiodism, Vernalization & FloweringMedium IBO·2024·Q36 — ptsPDF
Q37 Auxin Transport and Apical Dominance Plant HormonesHard IBO·2024·Q37 — ptsPDF
Q38 Chemical A, Gibberellin, and Wheat Seed Germination Seed Germination & Dormancy PhysiologyMedium IBO·2024·Q38 — ptsPDF
Q39 Intermittent Claudication and Cardiovascular Drug Treatments Cardiovascular PhysiologyMedium IBO·2024·Q39 — ptsPDF
Q40 Pharmacokinetics, Absorption, Distribution, Metabolism, Excretion Digestive & Metabolic PhysiologyEasy IBO·2024·Q40 — ptsPDF
Q41 Burmese Python Heart Mass Changes After Feeding Cardiovascular PhysiologyMedium IBO·2024·Q41 — ptsPDF
Q42 The Starling Equation and Capillary Fluid Exchange Cardiovascular PhysiologyMedium IBO·2024·Q42 — ptsPDF
Q43 Liver Lobule Zonation and Bile Flow Digestive & Metabolic PhysiologyMedium IBO·2024·Q43 — ptsPDF
Q44 Bee Thermoregulation and Body-Size Scaling Comparative ThermoregulationHard IBO·2024·Q44 — ptsPDF
Q45 COPD Lung Volume Changes and Pressure-Volume Curves Respiratory PhysiologyHard IBO·2024·Q45 — ptsPDF
Q46 Osmotic and Chemical Stress in a Marine Tardigrade Comparative Osmoregulation & ExcretionHard IBO·2024·Q46 — ptsPDF
Q47 Cancer Immunotherapy and Checkpoint Inhibitors Immune PhysiologyMedium IBO·2024·Q47 — ptsPDF
Q48 mRNA Nucleotide Modifications and Vaccine Design Immune PhysiologyMedium IBO·2024·Q48 — ptsPDF
Q49 CCHa1, Enteroendocrine Cells, and Sleep Arousal in Drosophila Nervous System PhysiologyHard IBO·2024·Q49 — ptsPDF
Q50 Bicoid, Exuperantia, and Body Axis Determination in Drosophila Evolutionary Developmental Biology (Evo-Devo)Medium IBO·2024·Q50 — ptsPDF