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A-level AQA biology paper 3 2025 verified questions and answers latest edition

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A-level AQA biology paper 3 2025 verified
questions and answers latest edition


What is binary fission? - ANS-Asexual replication



What is the primary structure of a protein? - ANS-The sequence of amino acids



What are the steps in binary fission? - ANS-1. Replicate circular DNA 2. Replicate plasmids 3. Cytoplasm
divides into two genetically identical daughter cells



What is the effect of Bedaquiline? - ANS-Inhibition of ATP synthase



Where are ADH receptors present? - ANS-In the distal convoluted tubule (DCT) and collecting duct



Where is water absorbed in the nephron? - ANS-From filtrate in the proximal convoluted tubule (PCT),
distal convoluted tubule (DCT), and collecting duct



Why can't plasma proteins pass through the basement membrane? - ANS-They are too large



What happens to blood pressure in the glomerulus? - ANS-It is higher



What is the general structure of an amino acid? - ANS-H2N-C(=O)-R



What is the significance of marking bees in research? - ANS-To allow for identification and control in
experiments



What are two precautions for obtaining comparable data in studies? - ANS-1. Collect data at the same
time of year 2. Marking does not hinder survival
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