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- 1. The selective ingredient in mannitol salt agar is ______________, which selects for the growth of Staphylococcus organisms.2. Gamma-hemolysis on a blood agar plate would likely appear: Select one: a. As no change in the medium b. Blue c. Yellow d. Green e. As a clearing.1. The technique used in bacteria for endospore staining can also be used to observe fungal spores. Select one: True False 2. Which of the following statements is/are TRUE? a. Agar does not provide nutrients to microorganisms. b. Peptone, pork extracts, and yeast extracts provide nutrients to microbes. c. Tap water must be used for preparing culture media. d. A & B are correct. e. B & C are correct Clear my choice 3. Motility of microorganisms is BEST observed with a a. Flagellar stain b. Hanging drop preparation c. Solid medium d. Negative stain e. Streak plate Clear my choice
- 1. Give the method of sterilization of these laboratory apparatuses how they are sterilized; inoculating loop, glasswares. culture media, skin, and milk. Please cite where you got the information. Thank you3. Why not test water samples directly for Salmonella typhosa or other pathogens?1. While working with Mannitol Salt Agar you notice the growth of staphylococci however other microorganisms are growing as well. How would you interpret this?
- Microbe(s) that is/are the target(s) of pasteurization include(s)a. Clostridium botulinum b. Mycobacterium species c. Salmonella species d. both b and c1. Briefly classify the bacteria. 2. Explain the following and give one example of eachi) selective media ii) Enrichment mediaHemoflagellates are transmitted bya. mosquito bites b. insect vectors c. bug feces d. contaminated food
- 9. What chemical reaction is undergone by acacia when borax is present? A. Hydrolysis B. Complexation C. Partial decomposition D. Precipitation 10. Which agent/s is unsuitable for Tragacanth mucilage? A. H2SO4 B. NaOH C. NaCl D. All of the above 11. What pressurized dosage forms containing one or more active ingredient? A. Inhalants B. Nebulizers C. Metered dose inhalers D. Aerosols 12. Which substances are prone to creaming? a. Inhalants b. Nebulizers c. Metered dose inhalers d. Aerosols 13. These are the reasons of formulating a topical emulsion, EXCEPT: a. Condition of the skin b. Emollient properties c. Tissue softening d. Anhydrous nature of agents1. The Petri Dish method is used in microbiology to raise bacteria in: a) rapid growth b) pure culture c) septic environment d) all of the above 2. What is the difference between antiseptic and sanitization? 3. In order to prevent any kind of contamination the medium must be _________ before placing it in the Petri dish. a) lyophilized b) pasteurized c) autoclaved d) distilledMicrobial control methods that kill __________ are able to sterilize. a. viruses. b. the tubercle bacillus c. endospores d. cysts