Saturday, June 6 2020, 23:21 pm
A-level Biology Question paper Unit 04 – Populations and …

A-level Biology Question paper Unit 04 – Populations and …

6 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 Figure 4. She then recorded the total volume of gas collected every 10 minutes for 1 hour. Figure 4 6(a) Explain why a layer of oil is required in this investigation. [1 mark]