OCR AS LEVEL BIOLOGY A H020/01 JUNE 2022 ACTUAL QUESTION PAPER - Breadth in Biology.
OCR AS LEVEL BIOLOGY A H020/01 JUNE 2022 ACTUAL QUESTION PAPER - Breadth in Biology. SECTION A You should spend a maximum of 25 minutes on this section. Write your answer for each question in the box provided. Answer all the questions. 1 The graph below shows the results of an osmosis experiment investigating the effect of changing the concentration 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] © OCR 2022 0.1 0.2 0.3 0.4 0.5 0.6 NaCl concentration (mol dm–3 ) 3 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?
Document information
- Uploaded on
- July 4, 2023
- Number of pages
- 25
- Written in
- 2022/2023
- Type
- Exam (elaborations)
- Contains
- Questions & answers
