Questions candidates found difficult on H2 Biology 9744 (Nov 2023) — radioactive labelling, the cell cycle, limiting factors, and heterozygote advantage.
Cell biology — interpreting isotope labelling; proportion of labelled monomers matters
Paper 1 Q16 — What happens in S phaseCell cycle — DNA and centriole replication both occur in S phase (interphase)
Paper 1 Q21 — One graph, one conclusionPhotosynthesis — a single variable’s graph cannot prove another factor’s effect
Paper 1 Q22 — Change tracks the limiting factorPhotosynthesis — the rate changes only with whichever factor is currently limiting
Paper 1 Q25 — Heterozygote advantage keeps all genotypesGenetics — heterozygote advantage cannot eliminate homozygotes from a cross
Original reconstructions inspired by the SEAB/Cambridge Examiner Report. Not actual examination questions.
Made by lookang, using Claude Fable 5. More resources: iwant2study.org