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A level Biology exam revision resources written by A level Examiners

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	1. Study Room - Biology - Biochemistry and Cells - Cell Structure - Explanation of Biochemistry and Cells, Cell Structure. (Resource Type: Study Room / Relevance Score : 7.03)

	2. Study Room - Biology - Organs and Systems - Xylem and Phloem Structure - Explanation of Organs and Systems, Xylem and Phloem Structure. (Resource Type: Study Room / Relevance Score : 6.63)

	3. GCSE, AQA, Higher (Spec B), June 2003 - Cell Structure based question (Resource Type: ExamGCSE / Relevance Score : 6.11)

	4. ScienceNet - Cell Biology FAQs - ScienceNet provides a database of frequently asked questions in relation to Cell Biology. There's also the option of asking a question, if you can't find what your looking for. (Resource Type: Link / Relevance Score : 5.87)

	5. Study Room - Biology - Genes and Genetics - The cell cycle - Explanation of Genes and Genetics, The cell cycle. (Resource Type: Study Room / Relevance Score : 5.44)

	6. Study Room - Biology - Physiology - Nervous Communication, Nerve Cells - Explanation of Physiology, Nervous Communication- Nerve Cells. (Resource Type: Study Room / Relevance Score : 5.08)

	7. Study Room - Biology - Biochemistry and Cells - Cell Fractionation - Explanation of Biochemistry and Cells, Cell Fractionation. (Resource Type: Study Room / Relevance Score : 4.95)

	8. Structure of the Earth - Detailed exploration of the structure of the earth. (Resource Type: Link / Relevance Score : 4.53)

	9. Study Room - Chemistry - Redox reactions - Cell conventions - Explanation of redox reactions. (Resource Type: Study Room / Relevance Score : 4.43)

	10. Electronic Structure - GCSE Recap - Useful notes on Electron Structure. (Resource Type: Link / Relevance Score : 4.39)

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11. Chromosome 11 - Genetic Simulation - At the moment, genetic counsellors can find out what diseases babies might be at risk from by investigating the family trees of the parents, as well as by conducting DNA tests. And in the future, we might well be consulting genetic counsellors just as often as we visit our doctors today.

In this activity you play the role of a genetic counsellor. Your task is to investigate the family tree of a set of parents and search for the sickle cell anaemia gene, which is located on Chromosome 11. Don't worry if you don't know much about genetics or sickle cell yet - the thought bubble at the top of the page will give you step by step instructions and you will have constant access to a medical reference book. (Resource Type: Link / Relevance Score : 4.29)

	12. Study Room - Biology - Genes and Genetics - The genetic code and protein synthesis - Explanation of Genes and Genetics, The genetic code and protein synthesis. (Resource Type: Study Room / Relevance Score : 4.25)

	13. Study Room - Chemistry - Extraction of metals - Aluminium - The Extraction of aluminium from its ores (Resource Type: Study Room / Relevance Score : 4.14)

	14. ScienceNet - Structure and Bonding FAQs - ScienceNet provides a database of frequently asked questions in relation to Structure and Bonding. There's also the option of asking a question, if you can't find what your looking for. (Resource Type: Link / Relevance Score : 4.02)

	15. Study Room - Biology - Biochemistry and Cells - Levels of Protein Structure - Explanation of Biochemistry and Cells, Levels of Protein Structure. (Resource Type: Study Room / Relevance Score : 3.90)

	16. Structure of Earth and Plate tectonics - The Jet Propulsion Laboratory / NASA maintain this site that provides an overview of the structure of the earth and plate tectonics. (Resource Type: Link / Relevance Score : 3.87)

	17. Study Room - Chemistry - Redox reactions - The standard hydrogen electrode - Explanation of redox reactions. (Resource Type: Study Room / Relevance Score : 3.86)

	18. Study Room - Biology - Biochemistry and Cells - Eukaryotic - Explanation of Biochemistry and Cells, Eukaryotic. (Resource Type: Study Room / Relevance Score : 3.84)

	19. Study Room - Biology - Genes and Genetics - Mitosis - Explanation of Genes and Genetics, Mitosis. (Resource Type: Study Room / Relevance Score : 3.74)

	20. Study Room - Biology - Organs and Systems - Transport in Plants - Explanation of Organs and Systems, Transport in Plants. (Resource Type: Study Room / Relevance Score : 3.66)

	21. Study Room - Chemistry - Transition metals - Electronic structure of the d-block metals - Explanation of electronic structure of the d-block metals. (Resource Type: Study Room / Relevance Score : 3.58)

	22. Study Room - Chemistry - Atomic structure - The electronic structure of ions - Explanation of Atomic structure, The electronic structure of ions. (Resource Type: Study Room / Relevance Score : 3.52)

	23. Study Room - Biology - Biochemistry and Cells - Prokaryotic - Explanation of Biochemistry and Cells, Prokaryotic. (Resource Type: Study Room / Relevance Score : 3.51)

	24. Study Room - Chemistry - Atomic structure - Electronic structure of atoms - Explanation of Electronic structure of atoms. (Resource Type: Study Room / Relevance Score : 3.45)

	25. Study Room - Biology - Genes and Genetics - Meiosis - Explanation of Genes and Genetics, Meiosis. (Resource Type: Study Room / Relevance Score : 3.43)

	26. Study Room - Biology - Biochemistry and Cells - Polysaccharides - Explanation of Biochemistry and Cells, Polysaccharides. (Resource Type: Study Room / Relevance Score : 3.39)

	27. GCSE, AQA, Higher (Spec B), June 2003 - Inheritance based question (Resource Type: ExamGCSE / Relevance Score : 3.31)

	28. The nuclear atom - Excellent set of pages from the schoolscience site providing historical notes on the the sructure of atoms. (Resource Type: Link / Relevance Score : 3.27)

	29. History of the Atom - Historical notes on the atom, covering main discoveries. (Resource Type: Link / Relevance Score : 3.23)

	30. Study Room - Biology - Genes and Genetics - Nucleic acids - Nucleotides - Explanation of Genes and Genetics, Nucleic acids, Nucleotides. (Resource Type: Study Room / Relevance Score : 3.16)

	31. Brain Explorer - Explore the structure of the Human Brain, learn about neurological control, and the many diseases and emotional disorders that can affect the brain. (Resource Type: Link / Relevance Score : 3.11)

	32. Study Room - Chemistry - Atomic structure - Electrons in boxes - Explanation of Atomic structure, Electrons in boxes. (Resource Type: Study Room / Relevance Score : 3.08)

	33. GCSE, AQA, Higher Tier (Spec B), June 2003 - Electron structure based question (Resource Type: ExamGCSE / Relevance Score : 3.08)

	34. GCSE, AQA, Higher Tier (Spec A), June 2003 - Alkenes based question (Resource Type: ExamGCSE / Relevance Score : 2.98)

	35. Study Room - Biology - Organs and Systems - Circulation - Blood Vessels - Explanation of Organs and Systmes, Circulation, Blood Vessels. (Resource Type: Study Room / Relevance Score : 2.97)

	36. How Your Brain Works - This site includes an information on How Your Brain Works, Neuron Structure, Basic Neuron Types, Brain Parts.... (Resource Type: Link / Relevance Score : 2.93)

	37. Periodicity - Notes on periodicity across Period 3, includes consideration of structure and bonding of the elements, conductivity and ionisation energy. (Resource Type: Link / Relevance Score : 2.92)

	38. Study Room - Chemistry - Atomic structure - Atomic structure - Explanation of Atomic structure, Atomic structure. (Resource Type: Study Room / Relevance Score : 2.90)

	39. Mass Spectrometer - Flash Animation - Shockwave animation of a mass spectrometer. (Resource Type: Link / Relevance Score : 2.89)

	40. Study Room - Biology - Biochemistry and Cells - The Plasma Membrane - Explanation of Biochemistry and Cells, Plasma Membrane. (Resource Type: Study Room / Relevance Score : 2.81)

	41. Structure of the Atmosphere - Read about the structure of the earths atmosphere, troposphere, stratosphere, mesosphere, thermosphere and exosphere ... its all here ! (See what we did there) (Resource Type: Link / Relevance Score : 2.80)

	42. Study Room - Biology - Biochemistry and Cells - Cell Techniques - Explanation of Biochemistry and Cells, Cell Techniques. (Resource Type: Study Room / Relevance Score : 2.74)

	43. Study Room - Chemistry - Structure & Bonding - The Properties of Compounds - The Properties of Compounds (Resource Type: Study Room / Relevance Score : 2.73)

	44. Study Room - Chemistry - The Alkanes, Alkenes and Benzene - Benzene - The structure - Explanation of the structure of benzene. (Resource Type: Study Room / Relevance Score : 2.69)

	45. Study Room - Biology - Organs and Systems - Water and Mineral Ion Transport - Explanation of Organs and Systems, Water and Mineral Ion. (Resource Type: Study Room / Relevance Score : 2.62)

	46. Study Room - Biology - Genes and Genetics - From one generation to the next - Explanation of Genes and Genetics, From one generation to the next. (Resource Type: Study Room / Relevance Score : 2.61)

	47. Study Room - Biology - Genes and Genetics - Nucleic acids - DNA Replication - Explanation of Nucleic acids, DNA Replication. (Resource Type: Study Room / Relevance Score : 2.58)

	48. GCSE, AQA, Higher (Spec B), June 2003 - Inheritance based question (Resource Type: ExamGCSE / Relevance Score : 2.47)

	49. Study Room - Biology - Organs and Systems - The Small Intestine - Explanation of Organs and Systmes, The Small Intestine. (Resource Type: Study Room / Relevance Score : 2.35)

	50. Study Room - Biology - Biochemistry and Cells - Factors affecting temperature - Explanation of Biochemistry and Cells, Factors affecting temperature. (Resource Type: Study Room / Relevance Score : 2.34)

	51. Study Room - Biology - Behaviour, Reproduction and Health - Human Reproduction - Explanation of Behaviour, Reproduction and Health, Human Reproduction,. (Resource Type: Study Room / Relevance Score : 2.32)

	52. Study Room - Biology - Biochemistry and Cells - Movement across membranes - Explanation of Biochemistry and Cells, Movement across membranes. (Resource Type: Study Room / Relevance Score : 2.32)

	53. Study Room - Chemistry - Atomic structure - Successive ionisation energies - Explanation of Atomic structure, Successive ionisation energies (Resource Type: Study Room / Relevance Score : 2.27)

	54. Study Room - Biology - Organs and Systems - Circulation - The heart - Explanation of Organs and Systmes, Circulation, The heart. (Resource Type: Study Room / Relevance Score : 2.27)

	55. Study Room - Chemistry - Transition metals - Explanation of Transition metals. (Resource Type: Study Room / Relevance Score : 2.27)

	56. Study Room - Chemistry - Extraction of metals - The Reactions - The Extraction of aluminium from its ores (Resource Type: Study Room / Relevance Score : 2.19)

	57. Study Room - Biology - Energetics - Respiration - Explanation of Energetics, Respiration. (Resource Type: Study Room / Relevance Score : 2.14)

	58. Study Room - Chemistry - Structure & Bonding - The Properties of Compounds - The Properties of Compounds (Resource Type: Study Room / Relevance Score : 2.12)

	59. Study Room - Chemistry - Atomic structure - Mass number - Explanation of Atomic structure, Mass number. (Resource Type: Study Room / Relevance Score : 2.10)

	60. Study Room - Chemistry - Atomic structure - First ionisation energies - Principal quantum level - Explanation of Atomic structure, First ionisation energies. (Resource Type: Study Room / Relevance Score : 2.06)

	61. GCSE, AQA, Higher (Spec B), June 2003 - Digestion based question (Resource Type: ExamGCSE / Relevance Score : 1.99)

	62. Human Brain Map - BBC interactive map of the human brain. (Resource Type: Link / Relevance Score : 1.99)

	63. Organic Chemistry On-Line - Excellent site on advanced organic chemistry. (Resource Type: Link / Relevance Score : 1.97)

	64. Study Room - Chemistry - Structure & Bonding - Covalent Bonds - Covalent Bonds (Resource Type: Study Room / Relevance Score : 1.95)

	65. Study Room - Biology - Biochemistry and Cells - Monosaccharides - Explanation of Biochemistry and Cells, Monosaccharides. (Resource Type: Study Room / Relevance Score : 1.90)

	66. Static Electricty - Introduction electrostatics, including : The Structure of Matter, Neutral vs. Charged Objects, Charge Interactions, Conductors and Insulators, and Polarization. (Resource Type: Link / Relevance Score : 1.88)

	67. Study Room - Chemistry - Atomic structure - First ionisation energies - Explanation of Atomic structure, First ionisation energies. (Resource Type: Study Room / Relevance Score : 1.87)

	68. Nervous System - Nerve Cells and Nerves - BBC resource explaining the function and structure of neurons. (Resource Type: Link / Relevance Score : 1.86)

	69. GCSE, AQA, Higher (Spec B), June 2003 - Reproduction in plants based question (Resource Type: ExamGCSE / Relevance Score : 1.84)

	70. Study Room - Biology - Energetics - Page 2 - Explanation of Energetics, Page 2. (Resource Type: Study Room / Relevance Score : 1.83)

	71. Study Room - Biology - Biochemistry and Cells - Differences between Prokaryotic and Eukaryotic Cells - Explanation of Biochemistry and Cells, Differences between Prokaryotic and Eukaryotic Cells. (Resource Type: Study Room / Relevance Score : 1.81)

	72. Study Room - Biology - Genes and Genetics - Protein synthesis - Explanation of Genes and Genetics, Protein synthesis. (Resource Type: Study Room / Relevance Score : 1.81)

	73. Earths Interior - Introduction to the structure of the earth, including coverage of Crust, Mantle and Core. (Resource Type: Link / Relevance Score : 1.79)

	74. Atomic and Molecular Orbitals - Notes on atomic and molecular orbitals including illustrations. (Resource Type: Link / Relevance Score : 1.79)

	75. Study Room - Biology - Behaviour, Reproduction and Health - Human Growth and Ageing, Population size and structure - Explanation of Behaviour, Reproduction and Health, Human Growth and Ageing, Population size and structure. (Resource Type: Study Room / Relevance Score : 1.78)

	76. This Dynamic Earth - Plate Tectonics - Ideal reference resource for study the earths structure and plate tectonics, suitable for GCSE. (Resource Type: Link / Relevance Score : 1.75)

	77. Carbonyl - Shockwave tutorial - Shockwave animated tutorial on the structure and reactivity of the carbonyl group, the properties of Aldehydes and Ketones. (Resource Type: Link / Relevance Score : 1.74)

	78. Study Room - Biology - Biochemistry and Cells - Inhibition - Explanation of Biochemistry and Cells, Inhibition. (Resource Type: Study Room / Relevance Score : 1.71)

	79. Aromatic chemistry - Aromatic chemistry notes, including the structure of benzene and reactions of benzene. (Resource Type: Link / Relevance Score : 1.68)

	80. Study Room - Chemistry - Periodicity - Electronegativity - Explanation of Electronegativity. (Resource Type: Study Room / Relevance Score : 1.63)

	81. Study Room - Chemistry - Atomic structure - Relative atomic masses of elements - Explanation of Atomic structure, Relative atomic masses of elements. (Resource Type: Study Room / Relevance Score : 1.62)

	82. Study Room - Biology - Biochemistry and Cells - Proteins - Explanation of Biochemistry and Cells, Proteins. (Resource Type: Study Room / Relevance Score : 1.60)

	83. Study Room - Biology - Genes and Genetics - Cystic Fibrosis - Explanation of Genes and Genetics, Cystic Fibrosis. (Resource Type: Study Room / Relevance Score : 1.59)

	84. Study Room - Chemistry - Periodicity - First ionisation energy - Explanation of First ionisation energy. (Resource Type: Study Room / Relevance Score : 1.56)

	85. Study Room - Biology - Physiology - Nervous Communication, Synapses - Explanation of Physiology, Nervous Communication- Synapses. (Resource Type: Study Room / Relevance Score : 1.54)

	86. Study Room - Chemistry - Thermodynamics - Drawing Born-Haber Cycles - Things to understand about Ionic Compounds - Thermodynamics - Drawing Born-Haber Cycles - Things to understand about Ionic Compounds (Resource Type: Study Room / Relevance Score : 1.50)

	87. Study Room - Chemistry - Structure & Bonding - Intermolecular Forces - Intermolecular Forces (Resource Type: Study Room / Relevance Score : 1.49)

	88. Study Room - Biology - Biochemistry and Cells - Phospholipids - Explanation of Biochemistry and Cells, Phospholipids. (Resource Type: Study Room / Relevance Score : 1.44)

	89. Study Room - Biology - Organs and Systems - Gas Exchange in Mammals - Exchange in mammals - Explanation of Organs and Systmes, Gas Exchange in Mammals, Exchange in mammals. (Resource Type: Study Room / Relevance Score : 1.43)

	90. Study Room - Chemistry - Structure & Bonding - Permanent Dipole Attraction - The Properties of Compounds (Resource Type: Study Room / Relevance Score : 1.42)

	91. Study Room - Chemistry - Inorganic Group Chemistry - Introduction - The Extraction of metals from ores (Resource Type: Study Room / Relevance Score : 1.41)

	92. Study Room - Chemistry - Bonding - Covalent Bonds - Electron Density - Covalent Bonds (Resource Type: Study Room / Relevance Score : 1.41)

	93. Study Room - Chemistry - Functional Groups and Isomerism - Homologous Series - Introduction - Functional Groups and Isomerism (Resource Type: Study Room / Relevance Score : 1.33)

	94. Study Room - Chemistry - Structure & Bonding - Summary - Summary (Resource Type: Study Room / Relevance Score : 1.30)

	95. Study Room - Chemistry - Structure & Bonding - Electronegativity - Electronegativity (Resource Type: Study Room / Relevance Score : 1.23)

	96. Study Room - Chemistry - Structure & Bonding - Hydrogen Bonding - The Properties of Compounds (Resource Type: Study Room / Relevance Score : 1.19)

	97. Study Room - Biology - Genes and Genetics - Nucleic acids - Deoxyribonucleic acid - Explanation of Nucleic acids, Deoxyribonucleic acid. (Resource Type: Study Room / Relevance Score : 1.17)

	98. Study Room - Biology - Genes and Genetics - Nucleic acids - Deoxyribonucleic acid - Explanation of Nucleic acids, Deoxyribonucleic acid. (Resource Type: Study Room / Relevance Score : 1.17)

	99. GCSE, AQA, Higher Tier (Spec B), June 2003 - Properties of Copper based question (Resource Type: ExamGCSE / Relevance Score : 1.16)

	100. Study Room - Biology - Organs and Systems - Transport of Sugars - Explanation of Organs and Systems, Transport of Sugars. (Resource Type: Study Room / Relevance Score : 1.15)

	101. Study Room - Chemistry - Redox reactions - Using standard electrode potentials - Explanation of redox reactions. (Resource Type: Study Room / Relevance Score : 1.14)

	102. Study Room - Physics - Quantum physics - Wave�particle duality - Explanation of Wave�particle duality (Resource Type: Study Room / Relevance Score : 1.13)

	103. Study Room - Chemistry - Structure & Bonding - The Properties of Compounds - The Properties of Compounds (Resource Type: Study Room / Relevance Score : 1.12)

	104. Study Room - Chemistry - Structure & Bonding - van der Waals Forces - The Properties of Compounds (Resource Type: Study Room / Relevance Score : 1.10)

	105. Study Room - Biology - Organs and Systems - The Large Intestine - Explanation of Organs and Systmes, The Large Intestine. (Resource Type: Study Room / Relevance Score : 1.10)

	106. Study Room - Physics - Quantum physics - The nuclear atom - Explanation of The nuclear atom (Resource Type: Study Room / Relevance Score : 1.09)

	107. Study Room - Chemistry - Transition metals - Variable oxidation state - Explanation of variable oxidation state. (Resource Type: Study Room / Relevance Score : 1.08)

	108. Study Room - Biology - Genes and Genetics -Nucleic acids - Ribonucleic acid - Explanation of Nucleic acids, Ribonucleic acid. (Resource Type: Study Room / Relevance Score : 1.01)

	109. Study Room - Chemistry - Atomic structure - Relative atomic mass - Explanation of relative atomic mass. (Resource Type: Study Room / Relevance Score : 0.96)

	110. Study Room - Biology - Physiology - Homeostasis - Temperature regulation - Explanation of Physiology, Homeostasis, Temperature regulation. (Resource Type: Study Room / Relevance Score : 0.93)

	111. Study Room - Chemistry - The Alkanes, Alkenes and Benzene - The Alkenes - Explanation alkanes and their reactions. (Resource Type: Study Room / Relevance Score : 0.90)

	112. Study Room - Biology - Energetics - Light Dependant Reactions - Explanation of Energetics, Light Dependant Reactions. (Resource Type: Study Room / Relevance Score : 0.90)

	113. Study Room - Chemistry - Structure & Bonding - Shapes of Molecules - Shapes of Molecules (Resource Type: Study Room / Relevance Score : 0.89)

	114. Study Room - Chemistry - Structure & Bonding - Ionic Bonding - Ionic Bonding (Resource Type: Study Room / Relevance Score : 0.89)

	115. Study Room - Chemistry - Periodicity - The oxides and chlorides of the third period - Explanation of The oxides and chlorides of the third period. (Resource Type: Study Room / Relevance Score : 0.86)

	116. Study Room - Chemistry - Inorganic Group Chemistry - Group I: the alkali metals - The Extraction of metals from ores (Resource Type: Study Room / Relevance Score : 0.83)

	117. Study Room - Chemistry - Thermodynamics - Drawing Born-Haber Cycles - Thermodynamics - Drawing Born-Haber Cycles (Resource Type: Study Room / Relevance Score : 0.80)

	118. Study Room - Biology - Biochemistry and Cells - Enyzmes - Explanation of Biochemistry and Cells, Enzymes. (Resource Type: Study Room / Relevance Score : 0.73)

	119. Study Room - Biology - Behaviour, Reproduction and Health - Human Growth and Ageing, Ageing - Explanation of Behaviour, Reproduction and Health, Human Growth and Ageing, Ageing. (Resource Type: Study Room / Relevance Score : 0.72)

	120. Study Room - Biology - Organs and Systems - Energy and exercise - Explanation of Organs and Systmes, Energy and exercise. (Resource Type: Study Room / Relevance Score : 0.69)

	121. Study Room - Chemistry - Inorganic Group Chemistry - Group II: the alkaline earth metals - Alkaline earth metals (Resource Type: Study Room / Relevance Score : 0.68)

	122. Study Room - Chemistry - The Alkanes, Alkenes and Benzene - Alkanes - Explanation alkanes and their reactions. (Resource Type: Study Room / Relevance Score : 0.67)

	123. Study Room - Chemistry - Atomic structure - The mass spectrometer - Explanation of The mass spectrometer. (Resource Type: Study Room / Relevance Score : 0.64)

	124. Study Room - Physics - Quantum physics - Radioactivity - Explanation of Radioactivity (Resource Type: Study Room / Relevance Score : 0.57)

	125. Study Room - Chemistry - Inorganic Group Chemistry - Group VII The Halogens - Group VII the Halogens (Resource Type: Study Room / Relevance Score : 0.57)