7. Sarah experimented with 100 betta fish. She wanted to know if increased temperatures affected food consumption. She divided them into two groups of 50 fish each: Group A and Group B. Group
A was maintained at room temperature (20 degrees Celsius). The temperature of Group B was
raised to 40 degrees Celsius. Which group was the control group?
a. There was no control group
b. All betta fish were in the control group
e. Group A
d. Group B

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.