At 09:00, a laboratory culture contains 750 bacteria of one species. The culture has enough nutrients throughout.
The mean division time changes during the investigation.
| Time interval | Mean division time in minutes |
|---|---|
| 09:00 to 10:30 | 30 |
| After 10:30 | 50 |
The culture can be used for further investigation when it contains at least 1.5 × 106 bacteria.
Calculate the earliest time at which the culture contains at least 1.5 × 106 bacteria.
Give your answer as a time using the 24-hour clock.
Show your working.
282 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.