AQA AS Level Biology Paper 1, November 2021
Every question from AQA AS Level Biology Paper 1, November 2021 (7401): 9 questions, 75 marks, each with its mark scheme and topic.
- Question 1 8 marks
Identify bonds in DNA, calculate gene length using a scale diagram, compare tRNA and mRNA structure, and describe pre-mRNA splicing differences.
Biology · 3.1 Biological molecules · 3.4 Genetic information, variation and relationships between organisms
- Question 2 6 marks
Name structures A and B of the human immunodeficiency virus (HIV) shown in Figure 2, and describe how HIV is replicated.
Biology · 3.2 Cells
- Question 3 9 marks
Answer questions about the microscopy, organelle function, magnification calculation, and surface area to volume ratio of the single-celled eukaryote Uronema marinum.
Biology · 3.2 Cells · 3.3 Organisms exchange substances with their environment
- Question 4 7 marks
Describe and explain chromosome arrangement during prophase, identify metaphase chromosome appearance for a diploid species, name the fixed gene position, and explain how a gene codes for a polypeptide.
Biology · 3.2 Cells · 3.4 Genetic information, variation and relationships between organisms
- Question 5 8 marks
Describe how the structure of glycogen relates to its function, name the type of peptidase hydrolysing bond G, find the number of different R groups, and calculate the number of polypeptides of specific lengths from a digestion table.
Biology · 3.1 Biological molecules
- Question 6 9 marks
Describe the pathway of a red blood cell from the kidney to the lungs, identify blood vessel M and explain its structure, and explain how water from tissue fluid is returned to the circulatory system.
Biology · 3.3 Organisms exchange substances with their environment
- Question 7 7 marks
Calculate the index of diversity for insects in plot 1, explain why the student's conclusion about species richness is incorrect, and describe how to estimate the total number of beetles in the meadow using the plot data.
Biology · Practical skills · 3.4 Genetic information, variation and relationships between organisms · Data analysis · Experimental design
- Question 8 11 marks
Analyze an osmosis investigation using unfertilised chicken eggs, evaluating table design, temperature effects, water potential conclusions, and methods to determine water potential.
Biology · Practical skills · 3.2 Cells · Data analysis · Experimental design
- Question 9 10 marks
Answer questions about EPO production, its biological advantage, the immune response in mice to produce anti-human EPO antibodies, the role of antibodies in an ELISA test, and ethical issues regarding monoclonal antibody production.
Biology · 3.2 Cells