The time it takes for a cell population to double in size is called the doubling time.
For hair follicle stem cells, the doubling time is 21.5 hours21.5\text{ hours}21.5 hours.
Starting with 111 hair follicle stem cell, calculate the time it takes for the population to reach 646464 cells. Assume a constant doubling rate.
For bone marrow stem cells, the doubling time is 36.0 hours36.0\text{ hours}36.0 hours.
Calculate how many times faster the growth of hair follicle stem cells is compared to bone marrow stem cells. Round your answer to two decimal places.
82 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.