AQA GCSE Combined Science: Trilogy Biology Paper 1 (Higher), 2019

Every question from AQA GCSE Combined Science: Trilogy Biology Paper 1 (Higher), 2019: 5 questions, 70 marks, each with its mark scheme and topic.

Question 1 12 marks
Identify structures and functions of the heart, recall the origin of digitalis, calculate stroke volume from cardiac output and heart rate, and explain why beta blockers can cause breathlessness during exercise.
Biology · B2: Organisation · B3: Infection and Response · B4: Bioenergetics
Question 2 10 marks
Name the enzyme that digests starch and explain, using a model with partially permeable tubing, how digestion and absorption of starch and sugar occur in the human digestive system.
Biology · B2: Organisation
Question 3 13 marks
Interpret and use data from a potometer investigation to explain transpiration, calculate rate of water uptake, plot results and predict the effect of different environmental conditions.
Biology · B2: Organisation · B4: Bioenergetics
Question 4 17 marks
Answer questions about pathogens, preventing malaria, differences between bacterial and eukaryotic cells, bacterial population growth, and why multicellular organisms cannot rely on diffusion alone using surface area to volume calculations.
Biology · B1: Cell Biology · B3: Infection and Response · B4: Bioenergetics
Question 5 18 marks
Calculate the real length of a root hair from microscope magnification, describe how to use a microscope at ×50, and use results about nitrate ion uptake with and without oxygen to explain absorption and the role of nitrates in plant growth.
Biology · Required Practicals · B1: Cell Biology · B4: Bioenergetics