(a(i))[1]
Name this kind of microorganism.
(a(ii))[1]
Name the gas given off by this microorganism during the production of bread and beer.
(b(i))[3]
Fig. 1.1 shows the gas released by strain B at a temperature of $18\ ^\circ\text{C}$. Draw a curve on Fig. 1.1 to show the effect on strain B of increasing the temperature by $10\ ^\circ\text{C}$.
(b(ii))[2]
Name two other outside factors that would alter the shapes of the curves shown in Fig. 1.1.
(c)[3]
Strain A tastes sweet and strain B tastes bitter. Suggest which strain is used to make bread. Give reasons for your answer.