AQA AS Level Biology Paper 2, November 2020
Every question from AQA AS Level Biology Paper 2, November 2020 (7401): 9 questions, 75 marks, each with its mark scheme and topic.
- Question 1 6 marks
Investigate variation in snail shell height between populations including sampling methods, statistical calculations, classification, and hypotheses testing.
Biology · Practical skills · 3.4 Genetic information, variation and relationships between organisms · Experimental design · Data analysis
- Question 2 7 marks
Describe phosphodiester bond formation, calculate maximum amino acids from base ratios and an equation, name proteins associated with DNA, and describe strand separation during semi-conservative replication.
Biology · 3.1 Biological molecules · 3.4 Genetic information, variation and relationships between organisms
- Question 3 9 marks
Explain arteriole blood flow reduction, deduce cardiac activity and blood movement from heart valve diagrams, identify blood pressure in vessels, and calculate post-exercise heart rate.
Biology · 3.3 Organisms exchange substances with their environment
- Question 4 9 marks
Analyze an experiment investigating the effect of ethanol, hydrochloric acid, and temperature on beetroot cell membrane permeability, including control of variables, measurement uncertainty, and conclusions from pigment release.
Biology · Practical skills · Required Practicals · 3.2 Cells · Experimental design · Uncertainty and evaluation · Data analysis · AS practicals (1–6)
- Question 5 9 marks
Investigate starch hydrolysis by amylase, drawing a results table, describing expected results, explaining competitive inhibition, and applying this to stale bread and weight loss.
Biology · Practical skills · Required Practicals · Data analysis · 3.1 Biological molecules · 3.3 Organisms exchange substances with their environment · AS practicals (1–6)
- Question 6 8 marks
Calculate the median mass of trout after 195 days using a growth graph and equation, complete a table on chromosome and DNA mass during mitosis and meiosis, explain genetic variation in meiosis, determine chromosome number in offspring from diploid eggs, and explain sterility due to an odd chromosome number.
Biology · 3.2 Cells · 3.4 Genetic information, variation and relationships between organisms
- Question 7 8 marks
Explain how HIV affects antibody production and evaluate the effectiveness of a drug in treating AIDS using data from a graph.
Biology · Practical skills · 3.2 Cells · Data analysis
- Question 8 9 marks
Calculate the percentage error of mean phloem pressure from table data, explain how pressure is generated via the mass flow hypothesis, describe the relationship between phloem pressure and xylem water movement from graphs, and explain why phloem pressure is reduced during the hottest part of the day.
Biology · Practical skills · 3.3 Organisms exchange substances with their environment · Data analysis
- Question 9 10 marks
Describe the processes involved in the absorption and transport of digested lipid molecules from the ileum into lymph vessels, and describe how the structure of a protein depends on the amino acids it contains.
Biology · 3.1 Biological molecules · 3.3 Organisms exchange substances with their environment