Cells, Membranes and Cell Division
Relate cell structures to function, compare transport mechanisms and distinguish mitosis, meiosis and reproductive consequences.
How to prepare for the current ESAT
Confirm your course combination, build no-calculator fluency from Mathematics 1 upward, and use official Pearson materials for authentic timing and interface rehearsal.
Core concepts
Concept 1
Compare eukaryotic and prokaryotic organisation and levels from cells to organ systems.
Exam cue: Name the membrane process and the direction of net movement.
Concept 2
Explain diffusion, osmosis through water potential and active transport.
Exam cue: Track chromosome copies and cell divisions separately.
Concept 3
Connect mitosis and meiosis to chromosome number, genetic similarity and biological purpose.
Exam cue: Link a cell component directly to its function.
Risk pitfalls and guardrails
Describing osmosis as movement of solute.
Guardrail: Do not use calculator-dependent shortcuts, import a fact outside the annual specification or overlook a unit, sign, scale or course-module boundary.
Saying active transport moves only from high to low concentration.
Guardrail: Do not use calculator-dependent shortcuts, import a fact outside the annual specification or overlook a unit, sign, scale or course-module boundary.
Confusing genetically identical mitotic cells with varied meiotic gametes.
Guardrail: Do not use calculator-dependent shortcuts, import a fact outside the annual specification or overlook a unit, sign, scale or course-module boundary.
Memory anchors
Prokaryote
No true nucleus; chromosomal and plasmid DNA are in the cell.
Diffusion
Net particle movement down a concentration gradient.
Osmosis
Net water movement through a partially permeable membrane.
Active transport
Energy-dependent movement against a concentration gradient.
Mitosis
One division produces two genetically identical cells.
Meiosis
Two divisions produce four genetically varied haploid cells.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Which structure is present in plant but not animal cells?
What is the main function of mitochondria?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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