Master GCSE Biology

Q1. Knowledge Recall (1 mark)

Define the term "aseptic technique" and explain its importance in scientific investigations.

Q2. Knowledge Recall (1 mark)

Name the two types of cell that bacteria can be classified as and state the key difference between them.

Q3. Application of Knowledge (2 marks)

Explain how you would use a microscope to calculate the average cell size of a bacterial specimen.

Q4. Knowledge Recall (1 mark)

State the independent variable and dependent variable when investigating the effect of temperature on enzyme activity using Benedict's reagent.

Q5. Application of Knowledge (2 marks)

Describe the role of controls in scientific investigations and explain how they help ensure reliability and validity of results.

Q6. Extended Response (3 marks)

Outline the steps involved in preparing a wet mount of a plant tissue sample for observation under a microscope.

Q7. Knowledge Recall (1 mark)

State the expected result of adding iodine solution to a potato cube placed in pure water.

Q8. Knowledge Recall (1 mark)

Name the substance that is tested for in a Benedict's reagent test and state the expected color change if the substance is present.

Q9. Application of Knowledge (2 marks)

Explain how the use of aseptic technique can help prevent contamination when inoculating a nutrient agar plate with a bacterial sample.

Q10. Extended Response (3 marks)

Describe the process of diffusion that occurs when a potato cube is placed in a concentrated sugar solution, explaining the roles of osmosis and the cell membrane.