Cells at the surface of the small intestine are regularly worn away and replaced.
A researcher labels one adult stem cell in the lining of the small intestine. Several days later, the label is present in more adult stem cells and in new cells that form part of the working lining.
Describe the processes that produced these two groups of labelled cells.
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.