Theoretical A Start Timed Attempt β π Leaderboard Theoretical A Exam + Official Answer Key Community Solutions (unofficial) No.TitleSubjectsPoints Q1 Tulip Parsimony and Morphological Characters Phylogenetic Trees & Cladistics β PDF Q2 Strigiformes (Owls) Phylogenetic Identification Phylogenetic Trees & Cladistics β PDF Q3 Bacterial Phylogenomics (RNA Polymerase vs Transposase) Molecular Systematics β PDF Q4 Tumor Microenvironment: OCR and Extracellular pH Bioenergetics & Central Metabolism Overview β PDF Q5 Antibody Mutagenesis and Cardiac Glycoside Binding (ELISA) Protein Structure, Folding & Function β PDF Q6 Ramachandran Plot and Peptide Bond Geometry Protein Structure, Folding & Function β PDF Q7 Pentose Phosphate Pathway (PPP) Bioenergetics & Central Metabolism Overview β PDF Q8 IGF2-H19 Imprinting and CTCF Loops Gene Regulation: Eukaryotic & Epigenetics β PDF Q9 ATAD1 Mitochondrial ATPase (Cryo-EM Study) Protein Structure, Folding & Function β PDF Q10 Magnetotactic Bacteria Navigation Cell Theory, Prokaryotes & Eukaryotes β PDF Q11 Directed Evolution of Enzyme D (NADH-Dependent) Recombinant DNA & Biotechnology Techniques β PDF Q12 DMSOβ Poisoning Case Study Plasma Membrane Structure & Transport β PDF Q13 Nitrogen Limitation of Legumes in Steppes Ecology β PDF Q14 Latitudinal Diversity Gradient: Three Hypotheses Ecology β PDF Q15 ENSO and Ecosystem Effects Ecology β PDF Q16 Fractal Geometry and Scale-Dependent Resource Availability Ecology β PDF Q17 Water Scarcity Index (Rws) and Solutions Ecology β PDF Q18 Animal Road Barrier Effect (Traffic Behavior Types) Mechanisms of Behavior β PDF Q19 Cumulative Cultural Evolution in Rock Pigeons Development & Learning β PDF Q20 Haploid/Diploid Organisms and Multi-Allele Genetics Mendel's Laws & Probability in Genetics β PDF Q21 Out-of-Africa Human Genetic Diversity and Effective Population Size Genetic Drift, Gene Flow & Mutation Human Evolution & Hominid Phylogeny β PDF Q22 ADH1B Allele Geography and Ethanol Metabolism Natural Selection: Modes & Fitness β PDF Q23 Drosophila Allele Frequency Experiment and Stabilizing Selection Natural Selection: Modes & Fitness Population Genetics & Hardy-Weinberg Equilibrium β PDF Q24 Codon Usage Bias Translation & the Genetic Code β PDF Q25 Mitochondrial RNase P Mutations and COXPD54 Pedigree Analysis & Human Genetic Disorders Mitochondria & Chloroplasts: Structure & Endosymbiotic Origin β PDF Q26 Mass Extinctions and Carbon Cycle Perturbations Macroevolutionary Patterns & Mass Extinctions β PDF Q27 Beta-Lactamase Mutational Trajectories and Epistasis Gene Interactions: Epistasis & Complementation Analysis β PDF Q28 Distribution of Fitness Effects and Effective Population Size Genetic Drift, Gene Flow & Mutation β PDF Q29 Endogenous Retroviruses and Retrotransposons DNA Repair & Recombination β PDF Q30 Gibberellin Transport and Root Endodermis Suberization Plant Hormones Root Anatomy β PDF Q31 Photorespiration Pathway Calvin Cycle, Photorespiration & C4/CAM Biochemistry β PDF Q32 Poaceae Stomata Synchronization Mechanism Stomatal Physiology & Gas Exchange β PDF Q33 Xanthophyll Cycle and Photoprotection Light Reactions & Photophosphorylation β PDF Q34 Maize Leaf Carbohydrate Allocation Phloem Transport & Translocation β PDF Q35 Sequoia Tree Water Use Strategies Water Transport & Transpiration β PDF Q36 Aquatic Carbon Uptake Calvin Cycle, Photorespiration & C4/CAM Biochemistry β PDF Q37 Root Water Movement and Osmotic Regulation Root Anatomy β PDF Q38 ECG Interpretation Cardiovascular Physiology β PDF Q39 Snow Leopard Hemoglobin at High Altitude Respiratory Physiology β PDF Q40 Circadian Misalignment in Mice Biological Rhythms β PDF Q41 Octopus Active Sleep and Circadian Control Biological Rhythms β PDF Q42 Electric Eel Prey Detection Foraging & Anti-Predator Behavior β PDF Q43 Saiga Nasal Anatomy and Wolf Predation Mammalian Comparative Anatomy Foraging & Anti-Predator Behavior β PDF Q44 TLR7/8 Activation in Sperm Sex Sorting Reproductive Physiology β PDF Q45 Vascularized Cardiac Tissue In Vitro Cardiovascular Physiology β PDF Q46 Channelrhodopsin-2 (ChR2) in Hippocampal Neurons Nervous System Physiology β PDF Q47 Cost of Transport in Locomotion Locomotion & Energetics β PDF Q48 Helium Dilution Test for Residual Volume Respiratory Physiology β PDF Q49 Esophageal Doppler Monitoring Cardiovascular Physiology β PDF Q50 Countercurrent System and Nephron Function Comparative Osmoregulation & Excretion β PDF