AQA AS Level Biology Paper 2, June 2024
Every question from AQA AS Level Biology Paper 2, June 2024 (7401): 9 questions, 75 marks, each with its mark scheme and topic.
- Question 1 6 marks
Explain the biological importance of water properties, how a porous pot model supports the cohesion-tension theory, and calculate the rate of water movement in glass tubing.
Biology · Practical skills · 3.1 Biological molecules · 3.3 Organisms exchange substances with their environment · Data analysis
- Question 2 9 marks
Calculate red blood cell dimensions and population size, explain the requirement for an isotonic dilution solution, and explain ABO blood group agglutination using antigen-antibody interactions.
Biology · Practical skills · 3.2 Cells · Data analysis
- Question 3 9 marks
Describe the process of cell fractionation and ultracentrifugation to isolate mitochondria, and evaluate data on whether resistance exercise training improves athletic performance.
Biology · Practical skills · 3.2 Cells · 3.1 Biological molecules · Experimental design · Data analysis · Uncertainty and evaluation
- Question 4 7 marks
Explain the location and mechanisms of eukaryotic transcription and RNA splicing using an experiment with adenovirus DNA and host cell mRNA, and compare with prokaryotes.
Biology · 3.4 Genetic information, variation and relationships between organisms
- Question 5 10 marks
Explain how rRNA gene analysis reveals phylogenetic relationships, discuss rainforest orchid adaptations, and state optical microscopy preparation and drawing conventions.
Biology · Practical skills · 3.2 Cells · 3.3 Organisms exchange substances with their environment · 3.4 Genetic information, variation and relationships between organisms · Experimental design
- Question 6 7 marks
Describe how to prepare a 60% dilution of disinfectant, determine the absolute and percentage uncertainty of a pipette measurement, and evaluate the disinfectant's effectiveness from absorbance data.
Practical skills · Required Practicals · Experimental design · Data analysis · Uncertainty and evaluation · AS practicals (1–6)
- Question 7 8 marks
Explain the causes and consequences of Edwards' syndrome, select an appropriate statistical test, and explain how a ventricular septal defect causes higher blood pressure in the lungs.
Biology · Practical skills · 3.2 Cells · 3.3 Organisms exchange substances with their environment · 3.4 Genetic information, variation and relationships between organisms · Data analysis
- Question 8 9 marks
Explain how an indirect ELISA test for Lyme disease works and evaluate clinical trial data comparing symptoms between PTLDS patients and a control group.
Biology · Practical skills · 3.2 Cells · Data analysis · Experimental design
- Question 9 10 marks
Describe the role of haemoglobin in loading, transporting, and unloading oxygen, and describe how a polypeptide is produced by the translation of mRNA.
Biology · 3.3 Organisms exchange substances with their environment · 3.4 Genetic information, variation and relationships between organisms