QCAA Biology EA study plan
QCAA Biology EA · Give each week a clear focus.
8 weeks · About 7 hours per week
Cells and multicellular organisms (Unit 3)
Describe the structure and function of prokaryotic and eukaryotic cells, including the roles of membrane-bound organelles
Compare plant and animal cells and explain how compartmentalisation improves metabolic efficiency
Explain the fluid mosaic model of the plasma membrane and predict the effects of changing temperature or lipid composition on membrane permeability
Interpret data on surface-area-to-volume ratios to explain constraints on cell size
Your checkpoint
A one-page annotated cell diagram plus a 200-word comparison of plant and animal cell compartmentalisation, self-marked against syllabus dot points
Cells and multicellular organisms (Unit 3)
Outline the stages of the cell cycle and identify where checkpoints regulate progression
Explain the roles of mitosis and meiosis in growth, repair and gamete formation
Describe how cells specialise and arrange into tissues, organs and organ systems in multicellular organisms
Analyse how the hierarchical organisation of cells enables efficient transport and exchange in a named organism
Your checkpoint
A hand-drawn flowchart of the cell cycle with checkpoints, plus a worked explanation of how a named organ system depends on specialised cell structure
Maintaining the internal environment (Unit 3)
Explain the principles of homeostasis, including stimulus-response pathways and negative feedback
Describe how the nervous system detects and responds to stimuli, including the roles of receptors, neurons and effectors
Interpret experimental data on body temperature regulation to identify homeostatic control mechanisms
Explain how hormonal signalling complements nervous control in maintaining internal balance
Your checkpoint
A stimulus-response diagram for one homeostatic variable (e.g. body temperature) with a paragraph explaining the feedback loop
Maintaining the internal environment (Unit 3)
Explain how the respiratory and circulatory systems cooperate to regulate gas concentrations and blood pH
Describe how the kidney and associated structures regulate water and solute balance
Analyse data on osmoregulation or blood glucose to evaluate the effectiveness of homeostatic control
Predict the consequences of a failure in a named homeostatic mechanism
Your checkpoint
A timed 25-minute extended-response answer on one homeostatic system, marked against a criteria sheet you write yourself
Heredity and continuity of life (Unit 4)
Describe the structure of DNA and explain the process of DNA replication
Explain transcription and translation, and outline how gene expression is regulated
Distinguish between genotype and phenotype and solve monohybrid and dihybrid inheritance problems
Interpret pedigree diagrams to infer modes of inheritance
Your checkpoint
A set of 15 solved genetics problems (monohybrid, dihybrid, pedigree) with working shown for each
Heredity and continuity of life (Unit 4)
Explain the sources of genetic variation, including mutation, meiosis and fertilisation
Describe how biotechnology techniques such as PCR and gel electrophoresis are applied
Evaluate the ethical and social implications of a named genetic technology
Explain how natural selection acts on heritable variation to change allele frequencies
Your checkpoint
A 400-word evaluation of one genetic technology, covering mechanism, application and ethical considerations
The living world - ecosystems and biodiversity (Unit 4)
Describe how energy and matter flow through ecosystems, including trophic levels and nutrient cycling
Explain the factors that influence population size and distribution
Interpret biodiversity data to compare species richness and evenness between communities
Analyse how human activity affects ecosystem stability and biodiversity
Your checkpoint
A data-response exercise interpreting a species-abundance table and calculating a simple diversity comparison
Cells and multicellular organisms (Unit 3) & Maintaining the internal environment (Unit 3) & Heredity and continuity of life (Unit 4) & The living world - ecosystems and biodiversity (Unit 4)
Synthesise connections between cell biology, homeostasis, heredity and ecosystems in integrated extended responses
Complete a full timed practice paper under exam conditions
Identify and remediate the three weakest syllabus dot points revealed by practice results
Build a one-page summary sheet of key terminology, formulae and processes across all four domains
Your checkpoint
A completed full-length practice paper with a written error analysis and a revised one-page summary sheet
Milestones
Week 2: Can explain cell structure, the cell cycle and cellular organisation without notes, scoring at least 80% on a self-made 20-question recall quiz
Week 4: Can construct a complete negative-feedback stimulus-response pathway for two different variables and interpret unfamiliar homeostasis data
Week 6: Can solve monohybrid and dihybrid problems and interpret a pedigree with at least 80% accuracy under timed conditions
Week 8: Completes a full practice paper within time and identifies three specific dot points for final revision