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AQA_AS Level Biology Paper 2_Question Paper 2022 | Practice Paper 2

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AQA_AS Level Biology Paper 2_Question Paper 2022 | Practice Paper 2 - - - - 1 A student investigated the rate of anaerobic respiration in yeast. She put 5 g of yeast into a glucose solution and ... placed this mixture in the apparatus shown in the figure below. She then recorded the total volume of gas collected every 10 minutes for 1 hour. (a) Explain why a layer of oil is required in this investigation. _____________________________________________________________ _____________________________________________________________ (1) (b) The student’s results are shown in the following table. Time / minutes Total volume of gas collected / cm3 10 0.3 20 0.9 30 1.9 40 3.1 50 5.0 60 5.2 Name: Practice Paper 2 Maximum marks: 91 Time Allowed: 2 hours These questions are from past papers covering topics and skills based on the advance information to help you prepare for the exams this summer. Answer all questions in the spaces provided. This document is licensed to Haggerston School - MB260045 AS-LEVEL BIOLOGYPage 2 (i) Calculate the rate of gas production in cm3 g–1 min–1 during the first 40 minutes of this investigation. Show your working. Answer = ____________________ cm3 g–1 min–1 (2) (ii) Suggest why the rate of gas production decreased between 50 and 60 minutes. - - - [Show More]

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