Lactose is naturally found in milk and is a key nutrient source for babies. Humans have the enzyme lactase in their intestines to help break down the lactose di-saccharide into individual sugar monomers. As people get older they may lose the ability to digest lactose and they become lactoseintolerant. To help people who are lactose-intolerant, manufacturers can make lactose-free milk by adding the enzyme lactase to the milk. A researcher conducts an experiment to determine how lactase responds to heat. She measures both percentage of unfolded lactase and lactase function. Assuming she starts the experiment at 370C (human body temperature), which of the following sets of data do you think she will observe? (If you cannot see the figure, click on the png here ) Graphs I and III Graphs I and IV Graphs II and III Graphs II and IV