Warming the yeast suspension increases the rate at which sucrose is broken down to glucose and fructose because warming A - VCE - SSCE Biology - Question 21 - 2005 - Paper 1

Warming the yeast suspension enhances the activity of sucrase, the enzyme that breaks down sucrose. This increase in temperature generally increases the kinetic energy of molecules, allowing for a better fit between the active site of the enzyme and the substrate (sucrose). As the temperature rises, the enzyme undergoes conformational changes that can optimize binding with the substrate, fostering more effective reactions. Therefore, option C is the correct answer.