* Doc Brown's Biology Revision Study Notes *

Suitable for GCSE/IGCSE/O level Biology/Science courses or equivalent

I am gradually writing GCSE biology notes for AQA GCSE biology, Edexcel GCSE biology, OCR (gateway science biology and 21st Century Science biology) exam board specifications.

Links to my new GCSE biology pages will be added to this biology index page AND to the GCSE science/biology pages summarising what you need to know for any GCSE science/biology paper specification (link below).

see also at end of page

General CELL BIOLOGY revision notes index

Introduction to plant and animal cell structure and function gcse biology revision notes

Stem cells and uses, and introduction to cell differentiation and specialisation gcse biology revision notes

Cell division - cell cycle - mitosis, meiosis, sexual/asexual reproduction, binary fission  gcse biology revision

Microscopy - the development and use of microscopes in biology  gcse biology revision notes

Diffusion - including demonstration, factors & Fick's Law, osmosis investigation and active transport  gcse biology

Examples of surfaces for the exchange of substances in animal organisms   gcse biology revision notes

Respiration - aerobic/anaerobic in plants, fungi & animals, substrates/products, experimental investigations

Enzymes - structure, functions, optimum conditions, investigation experiments, digestion  gcse biology revision

See also Enzymes and Biotechnology (gcse chemistry notes)

Culturing microorganisms like bacteria - testing antibiotics and antiseptics  gcse biology revision notes

 

Genetics - from DNA to GM and lots in between!

DNA and RNA structure and Protein Synthesis  gcse biology revision notes

Introduction to the GENOME, gene expression - considering chromosomes, alleles, genotype, phenotype, variations

An introduction to genetic variation and the formation and consequence of mutations  gcse biology revision notes

Introduction to the inheritance of characteristics and genetic diagrams (including Punnett squares)  including technical terms, Mendel's work and inherited genetic disorders gcse biology revision notes

Inherited characteristics and human sexual reproduction, genetic fingerprinting and its uses gcse biology

Genetic engineering - making insulin gcse biology revision notes

General HUMAN BIOLOGY revision notes

See also cell biology index above

Introduction to the organisation of cells => tissues => organs => organ systems (e.g. in humans)

Examples of surfaces for the exchange of substances in animal organisms   gcse biology revision notes

See also Enzymes - section on digestion and synthesis  gcse biology revision notes

The human circulatory system - heart, lungs, blood, blood vessels, causes/treatment of cardiovascular disease

Homeostasis - introduction to how it functions (negative feedback systems explained)  gcse biology revision notes

Homeostasis - control of blood sugar level - insulin and diabetes  gcse biology revision notes

Homeostasis - osmoregulation, ADH, water control, urea and ion concentrations and kidney function, dialysis

Homeostasis - thermoregulation, control of temperature  gcse biology revision notes

The brain - what the different parts do and the dangers if damaged gcse biology revision notes

An introduction to the nervous system including the reflex arc  gcse biology revision notes

Hormone systems - Introduction to the endocrine system - adrenaline & thyroxine hormones  gcse biology revision

Hormone systems - menstrual cycle, contraception, fertility treatments  gcse biology revision notes

Respiration - aerobic and anaerobic in plants and animals.  gcse biology revision notes

Keeping healthy - communicable diseases - pathogen infections   gcse biology revision notes

Keeping healthy - non-communicable diseases - risk factors for e.g. cancers   gcse biology revision notes

Keeping healthy - diet and exercise  gcse biology revision notes

Keeping healthy - defence against pathogens, infectious diseases, vaccination, drugs, monoclonal antibodies

See also Culturing microorganisms like bacteria - testing antibiotics/antiseptics  gcse biology revision

Food tests for reducing sugars, starch, proteins and lipids  gcse biology revision notes

The eye - structure and function - correction of vision defects  gcse biology revision notes

Optics - lens types (convex, concave, uses), experiments, ray diagrams, correction of eye defects (gcse physics)

See also GENETICS

 General PLANT BIOLOGY revision notes

See also cell biology section

Photosynthesis, importance explained, limiting factors affecting rate, leaf adaptations  gcse biology revision notes

Plant cells, transport and gas exchange in plants, transpiration, absorption of nutrients, leaf and root structure

See also Diffusion, osmosis, active transport, exchange of substances - examples fully explained

Respiration - aerobic and anaerobic in plants (and animals)  gcse biology revision notes

Hormone control of plant growth and uses of plant hormones  gcse biology revision notes

Plant diseases and defences against pathogens and pests  gcse biology revision notes

See also Adaptations, lots explained including plant examples  gcse biology revision notes

and a section on Stem cells and uses - meristems in plants (at the end of the page!)

Evolution, Adaptations, Environment, Speciation, Ecology, Communities, Cycles

Evolution - theories and evidence, variation, speciation - new/old species & extinctions, selective breeding

Adaptations, lots of examples explained including extremophiles  gcse biology revision notes

Carbon cycle, nitrogen cycle, water cycle and decomposition  gcse biology revision notes

Ecosystems - biotic & abiotic factors - interactions between organisms - interdependency  gcse biology notes

Food chains, food webs, trophic levels and biomass   gcse biology revision notes

See also from GCSE chemistry notes about pollution and climate change

Fossil fuel air pollution - incomplete combustion, carbon monoxide & soot particulates

Pollution, Accidents and Economic Aspects of the Petrochemical Industry

Greenhouse effect, global warming, climate change, carbon footprint from fossil fuel burning

Fossil fuel air pollution - effects of sulfur oxides and nitrogen oxides

LINKS for my revision pages for the NEW GCSE 9-1 science-biology courses, next exams May-June 2019

Revision Summaries for the new GCSE BIOLOGY courses that started with Y10 in Sept. 2016

AQA GCSE Biology 8461  1st Paper (Topics 1-4 & Combined Science Trilogy Biology 1 Topics 1-4)

AQA GCSE Biology 8461  2nd Paper (Topics 5-7 & Combined Science Trilogy Biology 2 Topics 5-7)

Edexcel GCSE (9-1) Biology 1st Paper (Topics 1-5 & Combined Science Biology 1 Topics 1-5)

Edexcel GCSE (9-1) Biology 2nd Paper (Topics 1, 6-9 & Combined Science Biology 2 Topics 1, 6-9)

OCR (9-1) Gateway Science GCSE Biology A 1st Paper (Topics B1-3 & Combined Science A Biology 1 Topics B1-3)

OCR (9-1) Gateway Science GCSE Biology A 2nd Paper (Topics B4-6 & Combined Science A Biology 1 Topics B4-6)

OCR (9-1) 21st Century Science GCSE Biology B Chapters B1-3 (Chapters B1-3, GCSE Combined Science B biology)

OCR (9-1) 21st Century Science GCSE Biology B Chapters B4-6 (Chapters B4-6, GCSE Combined Science B biology)

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