(a)[3]
Name each of the following: the gas liberated; the metabolic process that liberates it; the essential chemical constituents of the nutrient solution.
(b)[1]
Use Fig. 1.1 to determine the optimum temperature for the metabolic process.
(c)[3]
Explain the shape of the curve after $60~^{\circ}\text{C}$.
(d)[2]
Explain what would happen to the rate at which bubbles of the gas are produced by the yeast if the temperature of the solution is then gradually reduced from $65~^{\circ}\text{C}$ to $45~^{\circ}\text{C}$.