Questions where students often pick the tempting wrong answer — make sure you know the right one:
What is the key structural difference between prokaryotic and eukaryotic cells?✗ Prokaryotes have no DNA — that's why they have no nucleus.✓ Eukaryotes have a membrane-bound nucleus and membrane-bound organelles; prokaryotes do not.
What is the main role of mitochondria in a cell?✗ Mitochondria produce energy by creating it from nothing.✓ To carry out aerobic respiration, producing ATP that cells use as an energy currency.
What is the key difference between mitosis and meiosis?✗ Mitosis and meiosis both produce gametes; they are basically the same.✓ Mitosis produces two genetically identical diploid cells; meiosis produces four genetically different haploid cells (gametes).
In osmosis, which direction does water move?✗ Water moves from high solute concentration to low solute concentration.✓ From a region of higher water potential (less concentrated solution) to lower water potential.
What is a stem cell?✗ Stem cells are taken only from embryos and cannot be found in adults.✓ An undifferentiated cell capable of dividing to produce more stem cells or differentiating into specialised cell types.
Practise Cells & Transport — free games
Test yourself with these quick revision games for this topic:
