01
Cells and microscopy
Identify the cell structures you can see, explain their jobs and measure them correctly.
Junior college / 9477 / 2027
H2 Biology
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20 chapters / 108 lessonsYour place and answers stay on this browser.
02
Biological molecules
Use molecular bonds and shape to explain storage, support, membranes and proteins.
03
Membranes and transport
Choose the correct transport mechanism from the molecule, gradient and energy evidence.
04
Enzymes and investigations
Connect active-site chemistry to rate curves, inhibition and practical measurements.
05
Stem cells and differentiation
Separate developmental potential from self-renewal, then follow normal cell lineages.
06
DNA replication and gene expression
Track sequence, direction and information from DNA copying to a finished polypeptide.
07
Genomes and gene regulation
Explain how the same genome produces different cells, and locate control using experimental evidence.
08
Viral and bacterial genetics
Follow genomes through viral cycles, bacterial division and horizontal gene transfer.
09
DNA amplification and analysis
Choose PCR, a gel or a probe for the question, and interpret their controls honestly.
10
Mutation, cell division and cancer
Connect sequence changes, chromosome behaviour and regulation to inheritance and cell function.
11
Inheritance and genetic problems
Solve crosses from gametes, linkage and pathways, with clear probability assumptions.
12
Photosynthesis and energy capture
Trace photons, electrons, protons and carbon through the chloroplast.
13
Respiration and ATP production
Account for carbon and carriers, then explain how electron transfer supports ATP synthesis.
14
Cell signalling and glucose control
Connect receptor binding to amplification, cellular responses and negative feedback.
15
Evolution, species and phylogeny
Explain population change and use evidence to reconstruct branching relationships.
16
Population genetics
Count allele copies, use Hardy-Weinberg with confidence, and explain why variation persists.
17
Immune recognition and memory
Connect immune-cell roles, antibody structure and genetic diversification.
18
Infection, vaccination and disease spread
Link pathogen biology to disease, selective treatments and transmission models.
19
Climate, biodiversity and disease ecology
Connect carbon choices to ecosystem stress, food resilience and changing vector risks.
20
Practical and data skills
Plan a fair investigation, make sense of measurements and choose the right calculation or statistical test.