A fertilised egg divides by mitosis to form an embryo. The cells of the embryo then differentiate.
State what is meant by cell differentiation.
Explain why cell differentiation is important in a multicellular organism.
Some cells in the embryo differentiate into muscle cells. Muscle cells contain many mitochondria.
Explain why muscle cells need many mitochondria.
A student wrote:
"A muscle cell and a nerve cell from the same person contain different genes."
Explain why the student is wrong.
42 exam-style questions on Edexcel GCSE Biology 2.1 Cell division and growth, covering 2.1.1 Mitosis and the cell cycle, 2.1.2 Division producing identical daughter cells, 2.1.3 Cancer and uncontrolled cell division, 2.1.4 Growth in animals and plants, 2.1.5 Importance of cell differentiation, and 2.1.6 Percentile charts to monitor growth. Each one has a worked solution and a mark scheme showing where the marks go.