17 marks
At student investigated the effect of temperature on respiration in yeast over 1 hour. They used three different temperatures on the yeast species Saccharomyces cerevisiae.
They collected data and drew a graph of their results shown in Fig. 1.

Fig. 1
(i) State the temperature at which Saccharomyces cerevisiae carried out most respiration.
[1]
(ii) State the volume of CO2 produced at 30 minutes when Saccharomyces cerevisiae was kept at 25°C.
[1]
(iii) State the total volume of CO2 produced by Saccharomyces cerevisiae at 30°C.
[1]