AQA AS Level Biology Paper 2, June 2023
Every question from AQA AS Level Biology Paper 2, June 2023 (7401): 10 questions, 75 marks, each with its mark scheme and topic.
- Question 1 5 marks
Identify the correct function of ribosomes, name two biological molecules coded for by genes excluding proteins, and use data on phospholipid percentages to explain the structural and functional differences between rough and smooth endoplasmic reticulum.
Biology · 3.1 Biological molecules · 3.2 Cells · 3.4 Genetic information, variation and relationships between organisms
- Question 2 6 marks
Complete a passage about ATP synthase structure, reaction type, and cellular process, and explain how its shape allows it to catalyse ATP synthesis and allow hydrogen ion movement.
Biology · 3.1 Biological molecules · 3.2 Cells
- Question 3 9 marks
Explain the structure, digestion, and prebiotic properties of galacto-oligosaccharides (GOS) compared to lactose.
Biology · 3.1 Biological molecules
- Question 4 7 marks
Identify cardiac structures in the correct sequence, describe changes in cardiac output based on a bar chart during different exercise intensities, and explain how arterioles control blood flow.
Biology · 3.3 Organisms exchange substances with their environment
- Question 5 5 marks
Identify chromosome arrangements after meiotic divisions in rice cells and explain similarities and differences in genetic variation causes between normal and mutant populations lacking crossing over.
Biology · 3.4 Genetic information, variation and relationships between organisms
- Question 6 8 marks
Describe the hydrolysis of triglycerides, the functions of bile salts in lipid digestion, and how natural selection led to all mammals producing the lipase CEL.
Biology · 3.1 Biological molecules · 3.3 Organisms exchange substances with their environment · 3.4 Genetic information, variation and relationships between organisms
- Question 7 9 marks
Explain cell cycle DNA mass distribution from a graph, suggest tumour cell differences, describe mitosis chromosome behaviour, and calculate chromatid movement speed.
Biology · 3.2 Cells
- Question 8 8 marks
Investigate protein concentration using copper sulfate solution densities, dilution series preparation, graph interpretation, and evaluate consequences of blood testing errors.
Biology · Practical skills · 3.1 Biological molecules · Experimental design · Data analysis
- Question 9 8 marks
Analyze fish gill measurements, calculate surface area, relate surface area to fish activity level, and complete a phylogenetic classification table.
Biology · Practical skills · 3.3 Organisms exchange substances with their environment · 3.4 Genetic information, variation and relationships between organisms · Data analysis · Experimental design
- Question 10 10 marks
Outline the similarities and differences in structure between DNA and RNA, and between chloroplasts and mitochondria.
Biology · 3.1 Biological molecules · 3.2 Cells