Cambridge IAL Biology study materials
Cambridge IAL Biology study resources

Cambridge IAL Biology study plan

Cambridge IAL Biology · Give each week a clear focus.

8 weeks · About 7 hours per week

Week 1

AS Level content (main theoretical concepts, current applications of biology, advanced practical skills)

  • Build a one-page summary map linking biological molecules (water, carbohydrates, lipids, proteins) to their monomers, bonds and functions

  • Draw and label the fluid mosaic model from memory, then annotate the roles of phospholipids, cholesterol, glycoproteins and channel/carrier proteins

  • Compare transport mechanisms (diffusion, facilitated diffusion, osmosis, active transport, co-transport) in a table with direction, energy source and example

  • Practise calculating water potential and interpreting osmosis data from a described experiment without any figure

  • Write out the core practical method for investigating membrane permeability using beetroot and identify the variables to control

Your checkpoint

A 2-page handwritten summary sheet covering molecules and membranes, self-quizzed to at least 90% recall on a 20-item self-test you write yourself

Week 2

AS Level content (main theoretical concepts, current applications of biology, advanced practical skills)

  • Describe enzyme action using induced fit, and explain the effects of temperature, pH, substrate and inhibitor concentration on rate

  • Distinguish competitive from non-competitive inhibition with a worked example and predict graph shapes for each

  • Explain the structure of DNA and RNA nucleotides and compare DNA replication (semi-conservative) with transcription and translation

  • Outline the stages of mitosis and meiosis and state where crossing over and independent assortment occur

  • Solve genetics problems involving monohybrid and dihybrid crosses, including test crosses and probability

Your checkpoint

A worked problem set of 10 genetics and enzyme-kinetics questions with full reasoning shown, scored and error-logged

Week 3

AS Level content (main theoretical concepts, current applications of biology, advanced practical skills)

  • Explain gas exchange surfaces in mammals, insects and plants using Fick's law and link structure to function

  • Describe the cardiac cycle, interpret pressure and volume changes, and label a heart diagram from memory

  • Outline transport in plants: root hair uptake, transpiration, cohesion-tension and translocation in the phloem

  • Explain the roles of xylem and phloem and compare their structures in a table

  • Practise describing and explaining trends in unfamiliar transport data presented in text form

Your checkpoint

A comparative table of gas exchange and transport systems in at least four organisms, plus three data-interpretation answers written under timed conditions

Week 4

AS Level content (main theoretical concepts, current applications of biology, advanced practical skills)

  • Summarise classification, biodiversity and the principles of natural selection and evolution

  • Explain the causes of variation and how selection leads to adaptation and speciation

  • Describe immunity: non-specific defences, phagocytosis, the specific immune response and the role of antibodies

  • Distinguish active from passive immunity and explain vaccination and its limitations

  • Complete a timed mixed-topic paper covering weeks 1-4 and mark it against mark schemes

Your checkpoint

A completed 60-minute mixed AS-level practice paper with a scored mark breakdown and a written list of the five weakest topics

Week 5

A Level content (main theoretical concepts, current applications of biology, advanced practical skills)

  • Explain photosynthesis in detail: light-dependent reactions, photophosphorylation, the Calvin cycle and limiting factors

  • Describe respiration: glycolysis, the link reaction, Krebs cycle, oxidative phosphorylation and anaerobic pathways

  • Compare photosynthesis and respiration in a table of location, inputs, outputs and ATP yield

  • Interpret data on limiting factors, respiratory quotients and oxygen consumption in described experiments

  • Practise writing extended answers linking structure to function in chloroplasts and mitochondria

Your checkpoint

Two annotated flow diagrams (one for photosynthesis, one for respiration) drawn from memory and checked against notes, with every stage labelled

Week 6

A Level content (main theoretical concepts, current applications of biology, advanced practical skills)

  • Explain homeostasis using negative feedback, with thermoregulation and blood glucose control as worked examples

  • Describe the roles of insulin, glucagon, adrenaline and the kidney in osmoregulation and excretion

  • Explain nerve impulse transmission: resting potential, action potential, refractory period and saltatory conduction

  • Describe synaptic transmission, including the roles of neurotransmitters and the effect of drugs

  • Outline muscle structure and the sliding filament model of contraction

Your checkpoint

A set of five exam-style extended-response answers (homeostasis, kidney, neurones, synapses, muscle) each marked against mark-scheme points and rewritten once

Week 7

A Level content (main theoretical concepts, current applications of biology, advanced practical skills)

  • Explain coordination in plants using auxins and gibberellins, and describe tropisms

  • Describe ecosystems: energy flow, trophic levels, productivity, decomposition and the carbon and nitrogen cycles

  • Explain succession, conservation and the factors affecting biodiversity

  • Describe gene technology: PCR, gel electrophoresis, genetic screening and the ethical issues involved

  • Practise experimental design questions, including choosing controls, replicates and suitable statistical tests

Your checkpoint

A written experimental-design answer for two unseen scenarios, each including variables, controls, a sampling method and a named statistical test with justification

Week 8

AS Level content (main theoretical concepts, current applications of biology, advanced practical skills) & A Level content (main theoretical concepts, current applications of biology, advanced practical skills)

  • Complete two full timed mock papers, one weighted to AS content and one to A Level content, under exam conditions

  • Mark every answer against mark schemes and tag each lost mark by cause (knowledge, application, calculation, wording)

  • Re-teach the three weakest tagged areas using condensed notes and targeted questions

  • Practise command words (describe, explain, suggest, evaluate) with one-sentence answer plans for ten prompts

  • Build a final one-page formula-and-definitions sheet for quick pre-exam review

Your checkpoint

A completed error log across both mocks with a percentage score for each domain and a one-page revision sheet of definitions and calculations

Milestones

Week 4: Score at least 65% on the timed mixed AS-level paper and be able to name your five weakest topics from memory of the marked script

Week 6: Draw the photosynthesis and respiration diagrams with all stages correct from memory, and score at least 60% on the five extended-response answers

Week 8: Score at least 70% on the final mock and show that no single lost-mark cause accounts for more than 30% of your errors