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href="../2891/topic-11-animal-physiology-hl-paper-1-questions.html">Topic 11 Animal physiology HL Paper 1 questions</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../2896/paper-2-style-exam-questions.html">Paper 2 style Exam questions</a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../2717/paper-2-questions-topic-1-cells.html">Paper 2 questions Topic 1 Cells</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../3013/cross-topic-question-challenges.html">Cross topic question challenges</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../2996/paper-2-questions-from-topic-2-molecules.html">Paper 2 questions from Topic 2 Molecules</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../2898/paper-2-questions-topic-5-evolution.html">Paper 2 questions Topic 5 Evolution</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../462/01-cell-biology.html">01 Cell biology</a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../486/introduction-to-cells-11.html">Introduction to cells 1.1</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../606/ultrastructure-of-cells-12-.html">Ultrastructure of cells 1.2 </a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../607/membrane-structure-13-.html">Membrane structure 1.3 </a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../575/membrane-transport-14-.html">Membrane transport 1.4 </a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../608/the-origin-of-cells-15.html">The origin of cells 1.5</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../609/cell-division-16.html">Cell division 1.6</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../463/02-molecular-biology.html">02 Molecular biology</a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../577/molecules-to-metabolism-21.html">Molecules to metabolism 2.1</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../578/water-22.html">Water 2.2</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../600/carbohydrates-lipids-23.html">Carbohydrates & Lipids 2.3</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../601/proteins-24.html">Proteins 2.4</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../585/enzymes-25.html">Enzymes 2.5</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../602/structure-of-dna-and-rna-26.html">Structure of DNA and RNA 2.6</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../603/dna-replication-transcription-translation-27.html">DNA Replication, transcription, translation 2.7</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../604/respiration-28.html">Respiration 2.8</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../605/photosynthesis-29.html">Photosynthesis 2.9</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../465/03-genetics-sl.html">03 Genetics SL</a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../790/genes-31-.html">Genes 3.1 </a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../791/chromosomes-32.html">Chromosomes 3.2</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../792/meiosis-33.html">Meiosis 3.3</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../793/inheritance-34.html">Inheritance 3.4</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../794/genetic-modification-35.html">Genetic Modification 3.5</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../466/04-ecology-.html">04 Ecology </a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../795/species-and-communities-41-.html">Species and communities 4.1 </a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../796/energy-flow-42.html">Energy flow 4.2</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../797/carbon-cycle-43-.html">Carbon Cycle 4.3 </a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../798/climate-change-44.html">Climate change 4.4</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../467/05-evolution-.html">05 Evolution </a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../799/evidence-for-evolution-51-.html">Evidence for evolution 5.1 </a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../800/natural-selection-52.html">Natural selection 5.2</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../801/classification-of-biodiversity-53-.html">Classification of biodiversity 5.3 </a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../802/cladistics-54.html">Cladistics 5.4</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../468/06-human-physiology.html">06 Human physiology</a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../579/digestion-absorption-61.html">Digestion & absorption 6.1</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../580/blood-system-62.html">Blood system 6.2</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../591/defence-against-disease-63.html">Defence against disease 6.3</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../592/gas-exchange-64.html">Gas exchange 6.4</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../593/neurones-and-synapses-65.html">Neurones and synapses 6.5</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../594/hormones-and-reproduction-66.html">Hormones and reproduction 6.6</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../469/07-nucleic-acids-ahl.html">07 Nucleic acids AHL</a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1160/nucleic-acids-71-hl.html">Nucleic acids 7.1 HL</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1157/transcription-72-hl.html">Transcription 7.2 HL</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1158/translation-73-hl.html">Translation 7.3 HL</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../470/08-metabolism-ahl.html">08 Metabolism AHL</a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1195/metabolism-81-hl.html">Metabolism 8.1 HL</a></label></li><li class=""><label style="padding-left: 14px"><i 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class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1254/reproduction-in-plants-94-hl.html">Reproduction in plants 9.4 HL</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../472/10-genetics-ahl.html">10 Genetics AHL</a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1341/meiosis-101-hl.html">Meiosis 10.1 HL</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1342/inheritance-102-hl.html">Inheritance 10.2 HL</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1343/gene-pools-and-speciation-103-hl.html">Gene pools and speciation 10.3 HL</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><a class="expander" href="#" style="font-size: .9em"><i class="fa fa-fw fa-caret-right"></i></a><a href="../473/11-animal-physiology-ahl.html">11 Animal physiology AHL</a></label><ul class="side-nav level-1"><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../2063/antibody-production-vaccination-111-hl.html">Antibody production & vaccination 11.1 HL</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1345/movement-112-hl.html">Movement 11.2 HL</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1346/kidney-and-osmoregulation-113-hl.html">Kidney and osmoregulation 11.3 HL</a></label></li><li class=""><label style="padding-left: 14px"><i class="fa fa-fw"></i><a href="../1347/sexual-reproduction-114-hl.html">Sexual reproduction 11.4 HL</a></label></li></ul></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2824/option-a-neurobiology.html">Option A - Neurobiology</a></label></li><li 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