BIO205-Exam Two-2014-Previous Exam Used-harford community college-Microbiology (GL) (BIO 2, Exams of Biology

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Name: Points /150 BIO 205 - Exam Two Multiple Choice Identify the choice that best completes the statement ar answers the question. Each is worth three points. 1. Which of the following statements about antimicrobials is false? a Beta-lactams are the smallest group of antibiotics. b. Vancomycin is commonly used to treat MRSA infections. c. Gramicidin destroys bacterial membranes. d. Amphotericin B is used to treat systemic fungal infections. 2. What type of virus is this? a Polyhedral Virus b. Bacteriophage c. Helical Virus d. Enveloped Virus 3. Which of these statements is true regarding microbial control? a. Disinfection kills mast microbes, with the exception of endospores. b. Degerming destroys prions. c. Sterilization does nat kill all microbes. It lowers their numbers to safe levels. d. Sanitization involves the complete removal of microbes. 4. The minimal inhibitory concentration is the: a. Lowest concentration of an antimicrobial required to kill 90% of microbes. b. Lowest concentration of an antimicrobial used to kill microbes c. Lowest concentration of an antimicrobial used to inhibit growth d. Lowest concentration of an antimicrobial that causes antibiotic resistance 5. Which organism causes antibiotic-associated diarrhea? a. Deinococcus radiodurans Staphyloccus aureus Clostridium difficile Ascaris lumbracoides Enterobius vermicularis waog 6. Which of these antibiotic mechanisms of action is correct? a. Wancomycin damages the cell walls of bacteria. b. Rifampin inhibits the production of ribosomes. c. Tetracyclines bind to ligase, preventing it from sealing nicks. d. Flouroquinolones prevent the formation of folic acid.