AQA AS Level Biology Paper 1, June 2022
Every question from AQA AS Level Biology Paper 1, June 2022 (7401): 9 questions, 75 marks, each with its mark scheme and topic.
- Question 1 8 marks
Identify biological molecules from given structural formulas and describe the mechanism of absorption of amino acids in the ileum.
Biology · 3.1 Biological molecules · 3.3 Organisms exchange substances with their environment
- Question 2 6 marks
Give the two types of molecule from which a ribosome is made and complete a table to give four structural differences between a DNA molecule and an mRNA molecule.
Biology · 3.1 Biological molecules · 3.2 Cells · 3.4 Genetic information, variation and relationships between organisms
- Question 3 10 marks
Answer questions about cell structure, electron microscopes, bacterial features, and viral characteristics based on microscopy images and biological knowledge.
Biology · 3.2 Cells
- Question 4 9 marks
Conclude the oxygen uptake across a lugworm's body using partial pressure data, calculate dissolved oxygen volume from saturation and equation, and describe how to use a colorimeter calibration curve to determine pO2.
Biology · Practical skills · 3.3 Organisms exchange substances with their environment · Data analysis
- Question 5 9 marks
Describe protein primary structure formation, compare lock-and-key and induced-fit enzyme models, explain enzyme action at lower temperatures, calculate time taken for maltase hydrolysis, and identify the independent variable for an enzyme reaction curve.
Biology · Practical skills · 3.1 Biological molecules · Data analysis
- Question 6 7 marks
Calculate the ratio of the mass of iron ions in the plasma of a person with haemochromatosis to that of a healthy person using given data and explain iron ion roles and transport mechanisms.
Biology · 3.1 Biological molecules
- Question 7 9 marks
Define a tumour, describe how to determine a reliable mitotic index from tissue observed with an optical microscope, and evaluate the conclusion that mitotic index > 5 is a reliable indicator of cancer seriousness using data from a graph and table.
Biology · Practical skills · Required Practicals · 3.2 Cells · Experimental design · Data analysis · AS practicals (1–6)
- Question 8 7 marks
Calculate the concentration of undiluted bacterial cells and sketch a bar chart showing the effects of antimicrobial substances J and K on E. coli growth.
Biology · Practical skills · Required Practicals · 3.2 Cells · Data analysis · AS practicals (1–6)
- Question 9 10 marks
Analyze blood gas composition in the fetus versus mother, explain fetal protection via maternal IgG antibodies, discuss herd immunity and vaccination effects against measles and tetanus, and explain the immunological basis of booster vaccinations.
Biology · 3.2 Cells · 3.3 Organisms exchange substances with their environment