AQA AS Level Biology Paper 2, November 2021
Every question from AQA AS Level Biology Paper 2, November 2021 (7401): 9 questions, 75 marks, each with its mark scheme and topic.
- Question 1 8 marks
Identify the functional group and R-group structure of fatty acids, describe the emulsion test for lipids, and compare a historical membrane model with the fluid-mosaic model.
Biology · 3.1 Biological molecules · 3.2 Cells
- Question 2 7 marks
Describe features of the alveolar epithelium adapted for gas exchange, calculate the FEV1:FVC ratio from a volume-time graph for a person with emphysema, and explain how reduced tidal volume affects carbon dioxide exchange.
Biology · Practical skills · 3.3 Organisms exchange substances with their environment · Data analysis
- Question 3 8 marks
Answer questions on taxonomy, mutagenic agents, chromosome numbers during speciation of Spartina species, types of mutation, and sources of genetic variation.
Biology · 3.4 Genetic information, variation and relationships between organisms
- Question 4 8 marks
Identify common cell structures, explain the effect of amino acid concentration and antibiotic X on plasmid and circular DNA replication, and interpret ultracentrifugation results.
Biology · Practical skills · 3.2 Cells · Data analysis
- Question 5 9 marks
Analyze an experiment investigating amylase activity using starch-agar plates, including enzyme action, controls, biochemical testing, and dilution calculations.
Biology · Practical skills · Required Practicals · 3.1 Biological molecules · Data analysis · Uncertainty and evaluation · AS practicals (1–6)
- Question 6 9 marks
Analyze the effects of alcohol dehydrogenase alleles ADF and ADS on fruit fly survival and allele frequency over generations in an alcohol-rich environment.
Biology · Practical skills · 3.4 Genetic information, variation and relationships between organisms · Experimental design
- Question 7 8 marks
Describe ATP formation, calculate percentage decrease in amino acid absorption from a graph of cyanide concentration against rate of uptake in two bacterial cell types, and conclude about amino acid uptake mechanisms based on the data.
Biology · 3.1 Biological molecules · 3.2 Cells
- Question 8 8 marks
Analyze enzyme activity and reaction products using a multi-part question based on a sequence of reactions catalyzed by GOx and HRP enzymes.
Biology · Practical skills · 3.1 Biological molecules · Data analysis · Experimental design
- Question 9 10 marks
Explain five properties of water that make it important for organisms and describe the process of semi-conservative replication of DNA.
Biology · 3.1 Biological molecules