Required Practical skills appear throughout biology GCSE questions even when you never sat a particular lab in school—examiners test method, controls, hazards, and improvements.

Hub: Biology GCSE questions.

How practical questions are phrased

Describe a method (4–6 marks)

• Describe how you would investigate the effect of pH on the rate of amylase activity.

Independent variable (pH), dependent variable (time to clear starch / colour change), control variables (temperature, enzyme concentration), repeat and mean.

Safety and hazards (2–3 marks)

• Give one hazard when using iodine solution and how you would reduce the risk.

Named hazard + sensible precaution (goggles, low concentration, dispose correctly).

Analyse results (data)

• Plot a graph of the results in Table 1. or Calculate the mean time.

Axes labelled with units; graph skills.

Evaluate and improve

• Suggest one reason why Student A’s conclusion may not be valid.

Sample size, control missing, anomaly ignored, measurement error.

Practicals commonly referenced (check your spec)

Theme	Skills tested
Microscopy	Magnification, drawing cells
Enzymes	pH, temperature, rate
Osmosis	Potato mass change, concentration
Food tests	Starch, sugar, protein, fat
Reaction time / fieldwork	Variables, sampling

Confirm the exact list on your board’s specification (8461, 1BI0, etc.).

FAQ

Do practicals have to match what we did in class?

Examiners test standard methods from the spec, not your individual lab day.

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