Scientists take stem cells from the bone marrow of an adult.
The scientists try to make nerve cells from these stem cells, but they are not successful.
Which statement explains this?
Adult stem cells have already differentiated, so they cannot divide again.
Adult stem cells can only differentiate into a limited range of cell types.
Adult stem cells divide only by meiosis, so the new cells are not identical.
Adult stem cells contain fewer genes than embryonic stem cells contain.
194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.