The AQA A-Level Biology Paper 2 Exam is on Fri 12th June. Here are my observations about which topics haven't been examined for a while and could come up.

It is vital to revise and prepare for ALL topics. This is not a set of predictions for the paper, rather a set of observations of the topics that haven't been deeply assessed for a while.

Good luck everyone!

General observations:

2026

• Photoionisation (2019)
• Chemiosmosis / photolysis of water (not yet)
• Required Practical 8 dehydrogenase activity (2017)
• ATP synthase (not yet)
• Respirometer (2022)
• Required Practical 9 – respiration in single celled organisms
• Calorimitry / biomass – (gap fill in 2022, last big Q 2020)
• GPP (2018) , productivity (2019)
• Fertilisers (2020) leaching and eutrophication (not yet)
• Gravitropism (not yet)
• Kinesis
• Pacinian corpuscle (not yet – specimen paper)
• Resting potential (2021)
• No direct question on the action potential / refractory period / axon diameter
• Antagonistic muscle pairs (not yet)
• Glomerular filtrate (2020)
• Loop of Henle (specimen paper)
• Pedigree (2022)
• No big epistasis question (2023 small)
• Variation (2020 / 2023)
• Directional selection (2018), stabilising selection (none)
• Genetic drift (not yet)
• Belt transect (2019)
• Mutation and cancer (2022)
• Lack of questions on specific potency of stem cells – last stem cell (2020 / 2018)
• Epigenetics (2022)
• RNA interference (2021)
• Recombinant DNA technology (2020)
• Reverse transcriptase big question (2017)
• Plasmids (2020)
• Genetic counselling and personalised medicine (not yet), screening (2022)