1
Cell Structure and Organisation
Identify cell structures in light and electron images, compare plant and animal cells, and explain specialised-cell adaptations.
Loading page…
Loading blog content…
Loading page…
Loading blog content…
Choose a chapter or download the full set. These notes follow the 2027 K325 syllabus.
Last updated: 2026-07-17
Sitting the exam in 2027? Use K325. Sitting in 2026? Keep using the current 6093 syllabus and your school materials.
K325 is the controlling source for the 2027 Pure Biology track. The existing Sec 3 Biology guide remains the owner for its proven foundation-note queries rather than being moved into this hub.
Pure or Combined? Pure Biology K325 has 14 top-level topics. Combined Biology has 12, omits standalone Excretion and Homeostasis topics, and narrows Reproduction.
01
1
Identify cell structures in light and electron images, compare plant and animal cells, and explain specialised-cell adaptations.
2
Distinguish diffusion, osmosis, and active transport using gradients, membranes, energy, and context.
3
Connect carbohydrates, proteins, fats, enzymes, food tests, and molecular function to experimental evidence.
02
4
Trace alimentary-canal functions, digestion, absorption, liver roles, and alcohol effects within the K325 boundary.
5
Connect blood components, vessels, the heart, circulation, tissue exchange, and disease risk.
6
Separate breathing, gas exchange, and respiration, then relate structures and rates to energy demand.
7
Define excretion and trace urinary structures, nephron processes, urine production, and dialysis.
8
Use stimulus-response and feedback pathways to explain nervous, hormonal, and internal regulation.
9
Compare bacteria and viruses, then connect influenza, pneumococcus, vaccination, antibiotics, and resistance.
03
10
Link photosynthesis, leaf and root adaptations, xylem, phloem, transpiration, and limiting factors.
11
Interpret energy flow, carbon cycling, global warming, pollution, conservation, and sustainable resource use.
04
12
Connect DNA, genes, chromosomes, the polypeptide code, transgenic insulin production, and ethical evaluation.
13
Compare sexual and asexual reproduction and explain human and plant reproductive processes within scope.
14
Use genetic notation, simple crosses, ABO codominance, sex chromosomes, mutation, variation, and selection.
Official curriculum source: SEAB 2027 SEC G3 Biology K325 syllabus. Checked 15 July 2026. Recheck codes, outcomes and assessment details before annual updates.
The focus lines are Eclat revision guidance. They are not quoted syllabus text and do not replace the official learning outcomes.
This hub maps the official 2027 SEC G3 Biology K325 top-level topics. The linked SEAB syllabus remains authoritative for every assessable learning outcome and paper detail.
O-Level is still familiar reader language and 6093 is the 2026-and-earlier reference code. Students sitting in 2027 should use K325, while 2026 candidates must follow their current legacy syllabus and school instructions.
Only as a national comparison. IP schools control their own sequence, depth, and assessment scope, so IP students should use the separate IP route and follow current school materials first.