Q • Question 1 0 out of 1 points Amylase and DNase are both extracellular enzymes. Which of the following pertains to these two enzymes? • Question 2 1 out of 1 points B. subtilis is positive for gelatinase and amylase but negative for urease and DNAse. S. aureus is negative for gelatinase and amylase but postive for DNAse. Which test would you use to differentiate S. aureus from B. subtilis? • Question 3 1 out of 1 points Which of the following requires iodine when testing? • Question 4 1 out of 1 points A culture medium on which only gram-positive organisms grow and a yellow halo surrounds Staphylococcus aureus colonies is called a(n) • Question 5 1 out of 1 points After incubation on ice, there was liquid in test tubes 1 and 2 but none in test tube 3 and 4. Which test tubes are positive for gelatinase containing bacteria?