16. Why 70% alcohol is used as a disinfectant? Circle all possible explanation. O A. Alcohol denatures proteins in the plasma membrane or viral body thus destroying it rendering them ineffective and causing cell death or inhibiting reproduction. В. Water is used as a catalyst for the denaturation of proteins that leads to cell membrane destruction. O C. Alcohol can be taken in orally, destroys cells that entered the body. V D. Diluted alcohol evaporates slower compared to a pure alcohol since its highly volatile, providing more time for chemical reactions to take place. Е. 100% alcohol coagulates proteins instantly creating a film that protects the other proteins from further coagulation preventing other alcohol molecules to react and destroy the cell membrane. O F. Alcohol has a dehydrating effect and may interfere with the functioning of cell membranes.

1. Why is it helpful that the transmission compound light microscopes we studied in the lab are both parfocal and parcentered? 2. Why would it be harder to find a specimen on a slide starting with the 40x objective lens compared to the 4x objective lens. Support your answer with facts about the field of view and the comparison of both objective lenses. 3. If I wanted to observe something, let's a virus that was 50nm in size, which microscope would you recommend me using? Support your answer with facts about the microscopic utility.

1. A macrolide containing a 15-membered lactone ring    Erythromycin Telithromycin Clarithromycin Azithromycin   2. ALL are true about the activity of Macrolides EXCEPT:    It is effective against syphilis infections it resembles that of penicillin it is very effective against G(-) bacteria it is effective against erysipelas infections   3. These are ALL causes of bacterial resistance against macrolides EXCEPT:    active efflux bacterial endospores release of esterases modification of binding site   4. These are ALL adverse effects of Erythromycin EXCEPT:    CYP450 inhibition Hepatotoxicity Neutropenia Acute cholestatic hepatitis   5. These are drugs that have prolonged half-life when taken with erythromycin EXCEPT:    Rifampicin Lipitor Lanoxin Lasix

3. Ms. Roselli brings in the following prescription for her són Joey. swallow tablets, she asks you to fill the prescription with a liquid form. You have aman- tadine syrup 50 mg/5 mL in stock. (Note: 1 tsp = 5 mL. Equivalencies are available in the resources section of the Course Navigator.) R amantadine 100 mg PO bid × 3 days a. How milliliters in one dose? many are b. How many teaspoonsful are in one dose? c. How will the instructions read on the medication container label? d. How many milliliters will you dispense?