Explain why an enzyme stops working at high temperatures.
From Paper 1, Higher
63 marks
Explain the role of bile in digestion.
From Paper 1, Higher
74 marks
Explain why the human circulatory system is described as a double circulation.
From Paper 1, Higher
84 marks
Describe how water moves from the roots to the leaves in a plant.
From Paper 1, Higher
124 marks
Explain how smoking increases the risk of cardiovascular disease and lung cancer.
From Paper 1, Higher
193 marks
In an investigation, 2.4 cm³ of oxygen was collected in 40 s from hydrogen peroxide broken down by catalase. Calculate the mean rate of reaction in cm³/s and name one variable to control.
From Paper 1, Higher
203 marks
Explain how villi are adapted for absorbing digested food.
From Paper 1, Higher
213 marks
Compare the structure of arteries and veins.
From Paper 1, Higher
223 marks
In a potometer, the air bubble moved 3.6 cm in 12 minutes. The capillary tube has a radius of 0.5 mm. Calculate the rate of water uptake in mm³ per minute.
From Paper 1, Higher
266 marks
Evaluate the use of stents and statins to treat coronary heart disease.
Score 0 / 37 · 0 of 10 marked
This paper is written by Plasmo in the style of the AQA GCSE Biology exam. It is not a past paper and is not produced or endorsed by the exam board.