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Theoretical 1

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Theoretical 1 Exam Official Answer Key & Solutions
Q1 Stereochemistry of Citrate and Isocitrate in the Aconitase Reaction Bioenergetics & Central Metabolism Overview IBO·2020·Q1 — ptsPDF
Q2 Respiratory Control in Isolated Mitochondria: ADP, DNP and DCCD Bioenergetics & Central Metabolism Overview IBO·2020·Q2 — ptsPDF
Q3 Carbon Isotope Fractionation in C3 versus C4 Photosynthesis Calvin Cycle, Photorespiration & C4/CAM Biochemistry IBO·2020·Q3 — ptsPDF
Q4 Sedimentation Coefficient and Centrifugation Physics Biomolecular Analytical Techniques IBO·2020·Q4 — ptsPDF
Q5 ATP-Dependent Na+ Efflux in the Squid Giant Axon Nervous System Physiology Plasma Membrane Structure & Transport IBO·2020·Q5 — ptsPDF
Q6 Nernst Potentials and Ion Transport Direction in Root Epidermal Cells Mineral Nutrition & Nutrient Uptake Plasma Membrane Structure & Transport IBO·2020·Q6 — ptsPDF
Q7 Glucosinolate Distribution and Herbivore Choice in Arabidopsis Leaves Plant Stress Physiology & Defense IBO·2020·Q7 — ptsPDF
Q8 CAM-like Nocturnal Carbon Fixation in the Amphibious Plant Isoetes howelli Calvin Cycle, Photorespiration & C4/CAM Biochemistry IBO·2020·Q8 — ptsPDF
Q9 Start-Codon Selection Mechanisms in Prokaryotic versus Eukaryotic Translation Translation & the Genetic Code IBO·2020·Q9 — ptsPDF
Q10 Cytosine Deamination and Why Uracil Is Excluded from DNA Nucleotide & Nucleic Acid Chemistry DNA Repair & Recombination IBO·2020·Q10 — ptsPDF
Q11 Pedigree Analysis of Three Heritable Traits: Alfa, Baker and Charlie Pedigree Analysis & Human Genetic Disorders IBO·2020·Q11 — ptsPDF
Q12 Regulation of the rut Operon by the RutR Repressor and Uracil Gene Regulation: Prokaryotic IBO·2020·Q12 — ptsPDF
Q13 Bacterial Transcription Factors Coordinating Metabolic and Lifestyle Genes Gene Regulation: Prokaryotic IBO·2020·Q13 — ptsPDF
Q14 Matching Molecular Biology Techniques to Research Questions Recombinant DNA & Biotechnology Techniques Biomolecular Analytical Techniques IBO·2020·Q14 — ptsPDF
Q15 Gibberellin and Abscisic Acid Control of Seed Germination Plant Hormones Seed Germination & Dormancy Physiology IBO·2020·Q15 — ptsPDF
Q16 Designing Cloning Primers with Restriction Sites for Vector A Recombinant DNA & Biotechnology Techniques IBO·2020·Q16 — ptsPDF
Q17 Predicting Reading-Frame Effects of CRISPR-Cas9 Indels Recombinant DNA & Biotechnology Techniques IBO·2020·Q17 — ptsPDF
Q18 Transcriptional Attenuation of the E. coli trp Operon Gene Regulation: Prokaryotic IBO·2020·Q18 — ptsPDF
Q19 Tissue Distribution of the Glucagon Receptor and Metabolic Roles Endocrine System Physiology IBO·2020·Q19 — ptsPDF
Q20 Matching Muscle Energy Systems to Exercise Duration and Intensity Muscle Physiology Locomotion & Energetics IBO·2020·Q20 — ptsPDF
Q21 Huntingtin, Glycolytic ATP and Fast Axonal Transport Cytoskeleton & Motor Proteins Human Nervous System IBO·2020·Q21 — ptsPDF
Q22 Nephron Structure and Urine Concentrating Ability Across Habitats Human Excretory System Comparative Osmoregulation & Excretion IBO·2020·Q22 — ptsPDF
Q23 GABA-Induced Chloride Currents and Depolarization in a Hypothalamic Neuron Nervous System Physiology Plasma Membrane Structure & Transport IBO·2020·Q23 — ptsPDF
Q24 Nuclear-to-Cytoplasmic Ratio and the Midblastula Transition in Xenopus Cell Cycle, Mitosis & Meiosis IBO·2020·Q24 — ptsPDF
Q25 beta-catenin and GSK3beta in Xenopus Dorsal Organizer Formation Cell Signaling & Communication IBO·2020·Q25 — ptsPDF
Q26 Thermoregulatory Strategies of Endotherms and Ectotherms Comparative Thermoregulation IBO·2020·Q26 — ptsPDF
Q27 Finding the Minimal Reprogramming Gene Set for Fibroblasts Gene Regulation: Eukaryotic & Epigenetics IBO·2020·Q27 — ptsPDF
Q28 Southern Blot Evidence for Immunoglobulin Light-Chain Gene Rearrangement Recombinant DNA & Biotechnology Techniques Gene Regulation: Eukaryotic & Epigenetics IBO·2020·Q28 — ptsPDF
Q29 Stomatal Aperture Responses to Humidity in Air versus Helox Stomatal Physiology & Gas Exchange IBO·2020·Q29 — ptsPDF
Q30 Systemin and Jasmonate Signaling in the Tomato Wound Response Plant Stress Physiology & Defense Cell Signaling & Communication IBO·2020·Q30 — ptsPDF
Q31 Grafting Analysis of Strigolactone Biosynthesis and Perception in MAX Mutants Plant Hormones IBO·2020·Q31 — ptsPDF
Q32 Zinc and Iron Interactions in Arabidopsis Micronutrient Toxicity Mineral Nutrition & Nutrient Uptake IBO·2020·Q32 — ptsPDF
Q33 A CYCLOIDEA-like Gene Controlling Floral Symmetry in Sunflower Flower Anatomy & Reproductive Structures Evolutionary Developmental Biology (Evo-Devo) IBO·2020·Q33 — ptsPDF
Q34 Resource Sharing Between Stolon-Connected Ramets of Fragaria chiloensis Phloem Transport & Translocation IBO·2020·Q34 — ptsPDF
Q35 Distinguishing Osmotic and Ionic Ca2+ Signaling Mutants in Salt Stress Plant Stress Physiology & Defense Cell Signaling & Communication IBO·2020·Q35 — ptsPDF
Q36 Hardy-Weinberg, Genetic Drift and Fixation Probability in a Body-Color Locus Population Genetics & Hardy-Weinberg Equilibrium IBO·2020·Q36 — ptsPDF
Q37 Gene Duplication and Selection in Primate ECP/EDN Ribonuclease Genes Molecular Evolution & Neutral Theory IBO·2020·Q37 — ptsPDF
Q38 Parsimony Reconstruction of Opsin Gene Evolution in Human and Zebrafish Molecular Evolution & Neutral Theory IBO·2020·Q38 — ptsPDF
Q39 MC1R Alleles and Coat-Color Adaptation in Peromyscus polionotus Natural Selection: Modes & Fitness Population Genetics & Hardy-Weinberg Equilibrium IBO·2020·Q39 — ptsPDF
Q40 Sensory Drive Speciation in Lake Victoria Cichlids Speciation & Reproductive Isolation IBO·2020·Q40 — ptsPDF
Q41 Methodological Pitfalls in Molecular Phylogenetics Molecular Systematics IBO·2020·Q41 — ptsPDF
Q42 Reading a Cetacean Phylogeny for Lifestyle and Trait Evolution Evidence for Evolution IBO·2020·Q42 — ptsPDF
Q43 Hox Gene Collinearity and Ubx Function Across Insect Lineages Evolutionary Developmental Biology (Evo-Devo) IBO·2020·Q43 — ptsPDF
Q44 Pitx1 Expression and Convergent Pelvic Reduction in Stickleback Evolutionary Developmental Biology (Evo-Devo) IBO·2020·Q44 — ptsPDF
Q45 Density-Dependent Growth Curves and Extinction Risk in Two Life-History Types Ecology IBO·2020·Q45 — ptsPDF
Q46 Cost-Benefit Optimization of Animal Territory Size Aggression, Territoriality & Social Structure IBO·2020·Q46 — ptsPDF
Q47 Day versus Night Pollinator Contributions to Goldenrod Seed Set Coevolution & Species Interactions IBO·2020·Q47 — ptsPDF
Q48 Tracking Insecticide Resistance Allele Frequency Over Time in Mosquitoes Natural Selection: Modes & Fitness IBO·2020·Q48 — ptsPDF
Q49 Species Dominance-Rank Curves and Community Change Over 50 Years Ecology IBO·2020·Q49 — ptsPDF
Q50 Species Richness and Aboveground Biomass in Experimental Grassland Plots Ecology IBO·2020·Q50 — ptsPDF