OCR AS Level Biology A H020/01 Breadth in biology JUNE 2022 OFFICIAL QUESTION PAPER

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OCR AS Level Biology A H020/01 Breadth in biology JUNE 2022 OFFICIAL QUESTION PAPER. 1 The graph below shows the results of an osmosis experiment investigating the effect of changing the concentratio... n of sodium chloride (NaCl) on mass of potatoes. 10 5 Percentage change in 0 mass –5 –10 Which concentration of NaCl causes equal movement of water into and out of the potato? A 0.36 mol dm–3 B 0.40 mol dm–3 C 0.42 mol dm–3 D 0.62 mol dm–3 Your answer [1] 2 The reaction between carbon dioxide and water forms carbonic acid. This reaction is catalysed by the enzyme carbonic anhydrase. To catalyse this reaction, carbonic anhydrase needs a cofactor that attaches to its active site as a prosthetic group. What is the correct cofactor for carbonic anhydrase? A Ca2+ B Cl – C H+ D Zn2+ Your answer [1] 3 The table shows the numbers of different species of invertebrates found in four different areas in a woodland. Area Invertebrate species Woodlice Spiders Beetles Millipedes A 15 20 1 0 B 2 7 6 7 C 25 1 7 3 D 8 0 2 17 Which row shows the area that has the greatest species richness and greatest species evenness? Your answer [Show More]

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