Question 13
HA student grew a culture of bacteria that started with 500 cells. The table shows the number of bacteria after each division.
Table: The number of bacteria after each division
| Number of divisions | Number of bacteria |
|---|---|
| 0 | 500 |
| 1 | 1000 |
| 2 | 2000 |
| 3 | 4000 |
| 4 | 8000 |
| 5 | 16 000 |
Figure: Grid for plotting the data in the table
a.[4]
Complete the figure. You should:
- label the y-axis
- add the correct scale to the y-axis
- plot the data from the table
- draw a curve of best fit.
The point for 0 divisions has been plotted for you.
b.[1]
Write the number of bacteria after 5 divisions in standard form.
c.[3]
The mean division time of this bacterium is 24 minutes.
Calculate the number of bacteria in the culture 4 hours after the start. Give your answer in standard form.
1.1 Cell structure Questions
139 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.