GCSE Biology: Cell Division and Stem Cells

Cell division is where GCSE Biology first demands precise sequencing: what happens in which stage of the cell cycle, and what the outcome of mitosis actually is. This quiz covers the whole topic, from chromosome basics to the stem cell debate.

The opening questions establish the chromosome facts examiners test relentlessly: human body cells carry 46 chromosomes arranged as 23 pairs, and after mitosis each daughter cell carries exactly the same number — a point reinforced by a dedicated question that catches the common halving error (that belongs to meiosis, not mitosis). The cell cycle questions walk through the correct order of events: DNA replication and the growth of sub-cellular structures during interphase, mitosis separating the chromosome sets, and cytokinesis — named and tested directly — dividing the cytoplasm and membrane into two cells. The purpose questions anchor why this matters: growth and repair in multicellular organisms, producing genetically identical cells.

The stem cell half of the quiz distinguishes the three sources the specification names: embryonic stem cells with their broad (pluripotent) differentiation potential, adult stem cells from bone marrow with their narrower range, and plant meristem cells that retain the ability to differentiate throughout the plant's life. Application questions cover therapeutic uses, bone marrow transplants and agricultural cloning, and a dedicated question addresses the primary ethical concern around embryonic stem cell research — the kind of evaluation question that appears in the real exam's extended responses.

Each answer includes a clear explanation, and the flashcard deck drills the stage names and definitions so the sequencing questions become automatic.

• State human chromosome numbers and what mitosis preserves
• Order the stages of the cell cycle: interphase, mitosis, cytokinesis
• Explain why mitosis matters for growth and repair
• Compare embryonic, adult and meristem stem cells by differentiation potential
• Discuss medical and agricultural uses of stem cells and the ethical concerns

Topic scope follows the cell biology section of the Department for Education's GCSE combined science subject content: chromosomes, the cell cycle including mitosis, and the function and uses of stem cells from embryos, adult bone marrow and plant meristems.