Edexcel GCSE Biology Cells and Control - Part 1 - STEM cells and mitosis overview

Sep 5, 2026

Biology revision content for Edexcel GCSE focused on cells and control, covering how unspecialised cells differentiate into specialised types. Explains STEM cells, comparing human embryonic, adult stem cells, and plant meristems, including cloning potential, immune matching, infection risk, and ethical concerns. Connects stem-cell treatment possibilities with diabetes and paralysis. Summarises mitosis across six stages, the cell cycle link, and how mitosis supports growth, repair, and asexual reproduction, then links DNA change to cancer and uncontrolled division.

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Cell differentiation

STEM cells

Mitosis and the cell cycle

Cancer and cell growth

Percentile charts and growth monitoring

Edexcel GCSE Biology Cells and Control Part 1 Cell differentiation how a cell changes and becomes specialised so that different cells can carry out different functions. STEM CELLS Undifferentiated cell of an organism Divides to form more cells of the same type, and can differentiate to form many other cell types. | Human Embryonic stem cells | Can be cloned and made to differentiate into any cell type | Therapeutic cloning of stem cells to produce new tissue uses same genes so the body does not reject the tissue. Can be a risk of infection | | --- | --- | --- | | Adult stem cells | Can form into surrounding human cells e.g. blood cells | Tissue made from adult stem cells is matched to avoid rejection, risk of infection. Only a few types of cells can be formed. | | Meristems (plants) | Can differentiate into any plant cell type throughout the life of the pant. | Used to produce clones quickly and economically, e.g. rare species, crop plants with pest /disease resisitance | Treatment with stem cells may be able to help conditions such as diabetes and paralysis. Some people object to the use of stem cells on ethical or religious grounds Mitosis occurs during growth, repair, replacement of cells. Asexual reproduction occurs by mitosis in both plants & simple animals producing genetically identical clones. | Stage 1 | Interphase
(not part
of mitosis) | Before mitosis: Increase the number of sub-cellular structures e.g. ribosomes, mitochondria. DNA replication makes copies of chromosomes. | | --- | --- | --- | | Stage 2 | Prophase | Nucleus breaks down and spindle fibres appear. | | Stage 3 | Metaphase | Chromosomes are lined up on spindle fibres on the equator (middle) of the cell. | | Stage 4 | Anaphase | Chromosome copies are separated and pulled to opposite ends of the cell. | | Stage 5 | Telophase | A new nuclear membrane forms around each set of chromosomes. | | Stage 6 | Cytokinesis | Cell surface membrane forms to separate the cells (+new cell wall in plants) . | Cell division and growth MITOSIS is part of THE CELL CYCLE MITOSIS produces two genetically identical DIPLOID CELLS Cancer The result of changes in DNA that lead to uncontrolled growth and division | Growth in organisms | Growth in plants | Cell division and differentiation, elongation (cells increase in length) | | --- | --- | --- | | | Growth in
animals | Cell division and differentiation. | Percentile charts can be used to monitor growth The 50th percentile (bold line) is the median (average) growth of the population at that age. Half will be below and half above. Cells divide in a series of stages to produce two daughter cells, each with identical set of chromosomes to the parent cell (in the nucleus). better hope – brighter future

FAQs

How does cell differentiation relate to different cell functions?

A cell changes and becomes specialised so that different cells can carry out different functions. Differentiation allows cells to perform distinct roles in an organism.

What is the difference between embryonic, adult stem cells, and plant meristems?

Human embryonic stem cells are undifferentiated and can be cloned and made to differentiate into many cell types, while therapeutic cloning can produce new tissue but carries infection risk. Adult stem cells can form into surrounding human cells (e.g., blood cells) and tissue is matched to reduce rejection, but only a few cell types can be formed. Meristems in plants can differentiate into many plant cell types throughout life and are used to produce clones quickly and economically.

What happens during mitosis from interphase to cytokinesis?

Interphase increases sub-cellular structures and replicates DNA to copy chromosomes. Prophase shows spindle fibres forming as the nucleus breaks down, metaphase lines chromosomes on the equator, anaphase pulls separated copies to opposite ends, telophase forms new nuclear membranes, and cytokinesis separates the cells (with a new cell wall in plants).

Sep 5, 2026

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