Key term
Edexcel GCSE Combined Science Biology 1SC0
Key Concepts in Biology
Topic overviewEukaryotic and prokaryotic cellsSpecialised cells and their adaptationsMicroscopes and magnification calculationsSize, scale and units in cell biologyEnzyme action and denaturationFactors affecting enzyme activityEnzymes in synthesis and digestion, and rate calculationsDiffusion, osmosis and active transportOsmosis in potatoes and percentage change in mass
Cells and Control
Genetics
Topic overviewMeiosis and the formation of gametesDNA structure, genes and the genomeExtracting DNA from fruitAlleles, genotype and phenotypeMonohybrid crosses and sex determinationProbability and ratios from genetic crossesCauses of variation: genes and environmentThe Human Genome ProjectGenetic variation and the effects of mutation
Natural Selection and Genetic Modification
Health, Disease and the Development of Medicines
Topic overviewHealth, disease and susceptibilityPathogens and common infectionsHow pathogens spread, and the virus life cycleSexually transmitted infectionsPhysical barriers and chemical defencesThe immune system, immunisation and herd immunityAntibiotics and developing new medicinesLifestyle factors and non-communicable diseaseTreatments for cardiovascular disease
Plant Structures and Their Functions
Animal Coordination, Control and Homeostasis
Exchange and Transport in Animals
Topic overviewWhy multicellular organisms need exchange surfacesAlveoli and gas exchangeThe blood and its componentsArteries, veins and capillariesThe heart and the circulatory systemCellular respiration as an exothermic reactionAerobic and anaerobic respiration comparedInvestigating the rate of respirationCardiac output, stroke volume and heart rate
Ecosystems and Material Cycles
Exchange and Transport in Animals
Aerobic and anaerobic respiration compared
- 3 things to know
- Paper 2
Overview
The word and balanced symbol equations for aerobic respiration in mitochondria, anaerobic respiration producing lactic acid in muscles and ethanol and carbon dioxide in yeast and plants, fermentation, why anaerobic respiration releases less energy, and why sprinters respire anaerobically and what happens to lactic acid.
What you need to know
Answer each one before you reveal it.
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Key term
State the balanced symbol equation for aerobic respiration.
Key term
Name the organelle in which aerobic respiration takes place.
Questions from this subtopic
Each one with the model answer underneath.
- 1
State the word equation for aerobic respiration.
Model answer
Glucose + oxygen → carbon dioxide + water.
- 2
State the balanced symbol equation for aerobic respiration.
Model answer
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O.
- 3
Name the organelle in which aerobic respiration takes place.
Model answer
Aerobic respiration takes place in the mitochondria.
- 4
State the word equation for anaerobic respiration in a muscle cell.
Model answer
Glucose → lactic acid.
- 5
State the word equation for anaerobic respiration in yeast.
Model answer
Glucose → ethanol + carbon dioxide.
- 6
Name the process by which yeast respires anaerobically.
Model answer
Fermentation.
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