Biology 7401 Paper 1 June 2022, AQA AS-Level Past Papers with Mark Schemes

AQA AS Level Biology (7401) Jun 2022

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The exam assesses foundational biology topics, including molecular biology, cellular structure, and physiology. Key themes are biomolecules, enzymatic processes, protein synthesis, and DNA/mRNA structural differences. Physiological concepts include oxygen uptake in lugworms, enzyme-substrate interactions, and iron ion transport regulation. Experimental methods are emphasized in questions on microscopy, antimicrobial effectiveness, and enzyme activity. Additional topics address tumor biology, mitotic index evaluation, immunity, fetal-maternal antibody transfer, and vaccine-induced herd immunity. Quantitative skills are integrated through calculations involving microbial growth, dissolved oxygen, and reaction rates, fostering data interpretation proficiency.