Theoretical B Start Timed Attempt β π Leaderboard Theoretical B Exam + Official Answer Key No.TitleSubjectsPoints Q1 Dichotomous Key Branching & Taxonomic Resolution Taxonomic Keys & Identification β PDF Q2 Red Deer mtDNA Phylogeny & Bootstrap Support Molecular Systematics β PDF Q3 BRCA1/53BP1 and DNA Double-Strand Break Repair Pathway Choice DNA Repair & Recombination β PDF Q4 Calcium Channel Signaling in Pancreatic Beta Cells Cell Signaling & Communication β PDF Q5 Ketogenic Diet Metabolism and Catecholamine Seizure Latency Bioenergetics & Central Metabolism Overview β PDF Q6 ProQC β Synthetic Toehold-Switch Quality Control of Translation Recombinant DNA & Biotechnology Techniques β PDF Q7 DNA Fiber Assay and Replication Fork Progression DNA Structure & Replication β PDF Q8 Identifying DNA-Metabolism Enzymes from a Gel Assay Biomolecular Analytical Techniques β PDF Q9 Compound X, Polyploidy, and Checkpoint Kinases A/B Cell Cycle, Mitosis & Meiosis β PDF Q10 Heterodimer Formation, Ligand Signaling, and Stem Cell Differentiation Cell Signaling & Communication Gene Regulation: Eukaryotic & Epigenetics β PDF Q11 Proteasome vs. Lysosome Degradation and Protein Half-Life Endomembrane System & Protein Trafficking β PDF Q12 FRET-Based Protease Activity and Inhibitor Mechanism Biomolecular Analytical Techniques β PDF Q13 Shelterin, the T-loop, and Chromosome Bridge Formation DNA Repair & Recombination Cell Cycle, Mitosis & Meiosis β PDF Q14 Aral Sea Food-Chain Restoration and Salinity Tolerance Ecology β PDF Q15 Lotka-Volterra Competition Lines and Coexistence Outcomes Ecology β PDF Q16 Niche Dimensions and Stipa capillata Drought Adaptation Ecology β PDF Q17 Incompatible Insect Technique and Wolbachia-Induced Cytoplasmic Incompatibility Ecology β PDF Q18 Ant Invasion, Visibility, and a Lion-Zebra-Buffalo Trophic Cascade Ecology β PDF Q19 Heat-Balling Honeybee Defense Against Hornets Foraging & Anti-Predator Behavior β PDF Q20 Female Body Mass, Male Fighting, and Mating Outcomes in Crickets Mating Systems & Sexual Selection β PDF Q21 Cannibalism Probability and Injury Bias in Japanese Mitten Crabs Foraging & Anti-Predator Behavior β PDF Q22 Genomic Imprinting at the IGF2-H19 Locus Extranuclear & Non-Mendelian Inheritance β PDF Q23 ACE2/CTS1 Mutations and Multicellularity in Yeast Extensions of Mendelian Inheritance β PDF Q24 Robertsonian Translocation and Chromosome 14/21 Anomalies Chromosomal Variation: Number & Structure β PDF Q25 X-Linked Trait Allele Mixing and Pedigree Probability Sex Determination & Sex-Linked Inheritance Population Genetics & Hardy-Weinberg Equilibrium β PDF Q26 Intratumor Heterogeneity and Clonal Evolution Under Treatment Natural Selection: Modes & Fitness β PDF Q27 PCR Mapping of Genomic Rearrangements in Genes H and K Chromosomal Variation: Number & Structure β PDF Q28 Epistasis Between Two Hair-Pigmentation Genes Gene Interactions: Epistasis & Complementation Analysis β PDF Q29 Cas9 Target Sites, Donor Design, and Mutation Severity Recombinant DNA & Biotechnology Techniques β PDF Q30 Linked Genes Controlling Fruit Fly Wing Pigmentation Linkage, Recombination & Genetic Mapping β PDF Q31 Linkage Disequilibrium Between M* and Flanking Loci R/Q Linkage, Recombination & Genetic Mapping β PDF Q32 Venus Flytrap Closure β Temperature and Chemical Effects Tropisms & Nastic Movements β PDF Q33 PtrWOX4a and PtrVCS2 in Vascular Cambium Proliferation Secondary Growth & Wood Anatomy β PDF Q34 GAPLESS Proteins and Apoplastic Transport in Roots Root Anatomy β PDF Q35 Phytochrome B States, Temperature, and Nuclear Bodies Photoperiodism, Vernalization & Flowering β PDF Q36 CONSTANS, Photoperiod, and Seed Mass Photoperiodism, Vernalization & Flowering β PDF Q37 Auxin Transport and Apical Dominance Plant Hormones β PDF Q38 Chemical A, Gibberellin, and Wheat Seed Germination Seed Germination & Dormancy Physiology β PDF Q39 Intermittent Claudication and Cardiovascular Drug Treatments Cardiovascular Physiology β PDF Q40 Pharmacokinetics β Absorption, Distribution, Metabolism, Excretion Digestive & Metabolic Physiology β PDF Q41 Burmese Python Heart Mass Changes After Feeding Cardiovascular Physiology β PDF Q42 The Starling Equation and Capillary Fluid Exchange Cardiovascular Physiology β PDF Q43 Liver Lobule Zonation and Bile Flow Digestive & Metabolic Physiology β PDF Q44 Bee Thermoregulation and Body-Size Scaling Comparative Thermoregulation β PDF Q45 COPD Lung Volume Changes and Pressure-Volume Curves Respiratory Physiology β PDF Q46 Osmotic and Chemical Stress in a Marine Tardigrade Comparative Osmoregulation & Excretion β PDF Q47 Cancer Immunotherapy and Checkpoint Inhibitors Immune Physiology β PDF Q48 mRNA Nucleotide Modifications and Vaccine Design Immune Physiology β PDF Q49 CCHa1, Enteroendocrine Cells, and Sleep Arousal in Drosophila Nervous System Physiology β PDF Q50 Bicoid, Exuperantia, and Body Axis Determination in Drosophila Evolutionary Developmental Biology (Evo-Devo) β PDF