Master GCSE Biology

Questions:

Q1 Knowledge Recall (1 mark)

Define the term 'aseptic technique' and explain why it is important when investigating microorganisms.

Q2 Application of Knowledge (2 marks)

Describe how you would use aseptic technique to set up a controlled experiment to investigate the effect of temperature on the rate of yeast fermentation.

Q3 Extended Response (3 marks)

Explain how you could use a microscope to determine the size of cells in a plant tissue. Include the key steps of the method you would use.

Q4 Knowledge Recall (2 marks)

State the independent and dependent variables in an investigation of the effect of light intensity on the rate of photosynthesis.

Q5 Application of Knowledge (3 marks)

Explain the importance of controlling variables in a scientific investigation using the example of an investigation of the effect of temperature on the rate of enzyme activity.

Q6 Extended Response (4 marks)

Describe the principles behind the use of Benedict's and Biuret reagents to test for reducing sugars and proteins, respectively. Explain how you would interpret the results of these tests.

Q7 Knowledge Recall (1 mark)

Name the reagent used to test for the presence of starch and describe the expected result.

Q8 Application of Knowledge (2 marks)

Explain how you would use a potometer to investigate the effect of wind speed on the rate of transpiration.

Q9 Extended Response (4 marks)

Describe how anomalies can affect the reliability and validity of scientific investigations. Provide examples of anomalies and explain how they can be addressed.

Q10 Application of Knowledge (3 marks)

Explain the importance of precision in scientific investigations using the example of measuring the volume of a liquid using a pipette.

Mark Schemes: