(05.04 MC) © Public Domain In the enzyme reaction above, catechol is the substrate, oxygen is a reactant, catechol oxidase is the enzyme, benzoquinone is the product, and water (H2O) is a by-product. Which of the following will decrease the rate of this reaction? (2 points)

(06.02 LC) How could the overuse of household disinfectants weaken the immune system? (2 points)

(05.02 MC) Which of the following is NOT true of mechanical digestion? (2 points)

(04.02 MC) The following is an excerpt from the case study “It’s All Greek to Me,” where Dr. Stephens is explaining Nikoleta’s disease to Mr. and Mrs. Stamos: “Nikoleta has what is known as beta-thalassemia, …there are two types of hemoglobin proteins involved in the process of carrying oxygen, alpha and beta. You need both of them in order to have properly working hemoglobin. Nikoleta’s beta proteins don’t function correctly.” This finding explains why Nikoleta experienced (2 points)

(04.01 MC) Which of the following describes how the endocrine system could cause blood pressure to decrease? (2 points)

(06.02 LC) Which of the following is an accurate statement about pathogens? (2 points)

(04.01 MC) Which of the following would create the second heart sound? (2 points)

(05.02 MC)   Trial # Temprature °C Product formed (mg) 1 20 25.3 2 30 32.1 3 40 37.5 4 50 30.8 5 60 22.1 6 70 0 An enzyme-catalyzed reaction was run at five different temperatures (trials 1-5). The results are shown in the data table above. Based on the data, what is the optimal temperature at which this enzyme functions? (2 points)  

(06.02 MC) What are the functions of T memory cells? (2 points)

(04.01 MC) Which of the following blood vessels would have the slowest blood flow? (2 points)