A student grows bacteria on an agar plate in a school laboratory.
Complete the sentence. Choose one answer from the box.
| active transport | binary fission | photosynthesis |
|---|
Bacteria multiply by simple cell division. This is called .....
Choose one answer from the box to complete the sentence.
| once every 20 seconds | once every 20 minutes | once every 20 hours |
|---|
When bacteria have enough nutrients and a suitable temperature, they can divide as often as .....
Choose one answer from the box.
| inoculating loop | measuring cylinder | thermometer |
|---|
Name the piece of equipment the student uses to transfer the bacteria onto the agar.
Choose one answer from the box.
| 5 °C | 25 °C | 45 °C |
|---|
Give the temperature at which the student should incubate the agar plate.
The student prepared four agar plates, A, B, C and D. The Table shows the number of colonies on each plate after incubation.
Table: The number of colonies on each of the four agar plates after incubation
| Plate | Number of colonies |
|---|---|
| A | 14 |
| B | 31 |
| C | 8 |
| D | 25 |
Use the Table. Give the letter of the plate with the largest number of colonies.
163 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.