plumiConditions for bacterial growth: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 4.3.1 Conditions for bacterial growth, 2019–2025, with mark schemes and examiner’s reports where available.
All papers
All years
Q7(c)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ3(a)(i)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ3(b)(iv)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ4(c)(i)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ4(c)(ii)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFQ3(c)(ii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ5(b)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ4(a)(i)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ2(b)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ2(c)(ii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ4(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ5(b)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ1(b)(ii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ6(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDF
All 14 questions on Conditions for bacterial growth, as a list
- June 2025, Unit 4, Q7(c) (3 marks): The scientists cultured the bacteria at different pHs and different temperatures. The graphs show the results. Key Number of bacteria Concentration of pigment N
- October 2024, AS Unit 3, Q3(a)(i) (2 marks): Explain why the dishes were incubated for 48 hours at 30°C. (2) 48 hours 30°C
- June 2024, AS Unit 3, Q3(b)(iv) (3 marks): The table shows some differences between the method using bacteria and the method using fungi. Type of Incubation Length of Type of agar microorganism temperatu
- October 2023, AS Unit 2, Q4(c)(i) (2 marks): Explain why an optimum temperature and water are needed for bacterial growth. (2) Optimum temperature Water
- October 2023, AS Unit 2, Q4(c)(ii) (3 marks): Explain the results for these two types of bacteria shown in the graph. (3)
- June 2023, AS Unit 2, Q3(c)(ii) (2 marks): The fluid of the pitcher plant contains water and molecules from digested organisms, which bacterial cells need for growth. Explain two other conditions needed
- January 2023, AS Unit 2, Q5(b) (6 marks): Bacterial growth and survival can be affected by changing conditions. The effect of temperature and desiccation (water removal) on different bacteria was invest
- October 2022, AS Unit 2, Q4(a)(i) (3 marks): Bacteria can grow on the surfaces of chopping boards. Explain the conditions that would result in the greatest bacterial growth on the surface of a chopping boa
- June 2022, AS Unit 2, Q2(b) (4 marks): The effect of concentrations of sodium chloride solution on the growth of bacteria was investigated. The same number of L. piscium bacteria were added to test t
- June 2022, Unit 4, Q2(c)(ii) (1 mark): The bacteria were not growing at their fastest rate in the conditions the student used. How many of the following changes could result in a faster growth rate?
- October 2021, AS Unit 2, Q4(a) (2 marks): Large quantities of this organism need to be grown in a culture medium in order to extract enough curacin A. The culture is kept at the optimum temperature for
- October 2021, Unit 4, Q5(b) (2 marks): Explain why the microdilution plate had to be incubated at an appropriate temperature for E. coli for 72 hours. (2)
- January 2021, AS Unit 2, Q1(b)(ii) (3 marks): Decomposition of bioplastic bags occurs faster if there is increased bacterial growth. Explain the conditions needed for increased bacterial growth. (3)
- October 2020, AS Unit 2, Q6(a) (4 marks): Explain the conditions needed for the growth of bacteria. (4)
Questions, mark schemes and examiner’s reports are © Pearson Edexcel, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Edexcel International A Level Biology past papers.
The Plumi iPad app also offers exam-style questions with AI feedback on your handwritten working.