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Pre-Lab Questions 1. How could you test to see if an enzyme was completely saturated during an experiment? 2. List three conditions that would alter the activity of an enzyme. Be specific with your explanation. 3. Take a look around your house and identify household products that work by means […]

Cell A secretes Substance M. Substance M travels via the blood and reaches cell B. Substance M binds to a receptor on the surface of cell B. Cell B responds by increasing its production and release of Substance N. what type of chemical messenger is Substance M? a. paracrine b. […]

Question 1: Explain the difference between tolerance and dependence. What symptoms occur during withdrawal syndrome? Question 2: Briefly present the significance of cross-dependence and cross-tolerance. Why drug dependence and abuse are medical problems that require long-term treatment. Question 3: Compare the mechanism of action of illicit drugs. Which ones are […]

The depth of the hemocytometer sample box is 0.1mm for all questions. Show all calculations. 1. You count 74 cfu on a pour plate. The plate was prepared by spreading 0.2 ml of a 1:10,000 dilution of the original sample. What is the density of the original culture (in cells/ml)? […]