Q11 - Calculating Cell Cycle Length and Initial Ratio from Growth Curves
A cultured cell of somatic cell A and a cultured cell of somatic cell B of an animal were prepared. A culture dish containing an appropriate amount of cells was prepared, and the number of cells after a certain period of time (at the start of the experiment) and the number of cells after 48 hours were counted. Cell number (x10^5): at time 0, somatic cell A = 7.2, somatic cell B = 9.7; at 48 hours, somatic cell A = 115.2, somatic cell B = 77.6.
Using the information and data, determine which of the statements are true or which are false.
Q11-1 somatic cell A. How long is the cell cycle of somatic cell A?
Q11-1 somatic cell B. How long is the cell cycle of somatic cell B?
Q11-2. When somatic cells A and B were mixed at a certain ratio and a culture was started, the ratio of the cell numbers of A and B after 4 days was 2:1. What was the ratio of somatic cell A and B cell numbers when the culture was started?
Question reproduced from IBO 2020, Theoretical Exam 2, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)