True or False (True A: False B)(13-18) 13. The capsule of Streplococcus prevents

Question

True or False (True A: False B)(13-18) 13. The capsule of Streplococcus prevents phagocytic white blood cells from engulfing destroyine thccus pmewmonine prevents phagocytic white blood cells from engulring and destroying this bacterial pathogen 14. In Gram staining procedure, the primary stain is methylene blue 15. The they have a thickto heat, radiation, acids and many chemical is due in part to the fact that of mycolic acid 16. Non-acid fast bacteria such as Bacüllus subailis are stained blue 17. Rhicobiom and Azobacter arn oe are examples of nitrogen-fixing hacteria 18. Photoheterotrophs molecules such as glutamate Multiple choices (19-25) 19. Medium can be from growing, Such a medium is called a made with components that will allow certain bacteria to grow but will inhibit others a. selective medium c, a differential medium d. a solid agar medium b. a suppressive medium 20. The exosporium or endospore coat is composed of b. protein c phospholipids d none of the above 21. Endospores are produced by bacteria in the genus a. Staphylococeusb. Clostridi d' (a) and (b) ?.?)cobacterium 22. Some bacteria can grow by respiratory means if oxygen is present but if oxygen is absent, they can also grow using fermentation. These bacteria are a. obligate acrobes c. obligate aerobes e. none of the above b. aerotolerant microorganisms d.microaerophiles 23. Streptococcus mutans belongs to the group of a. obligate acrobes c. facultative anaerobes 24. Which of the following enzymes are likely to be found in anaerobic bacteria? a. catalaseb. superoxide dismutasec peroxidase 25. Which of the following is false about trypoone ghucose yeast extracts medium? a. is used to prepare "shake tubes" d. none of the above b. is used primarily for the cultivation of anaerobes c. it is used to determine the onysen rfent bacteria True or False (True A:; False B) (26-30) 26. The significance of a of inhibition varies with the type of microorganism usually of low molecular weight ics are compre classified as steriliants or sprocies because they destroy all microbial life 28. Some disinfectants are classified as except endospores that reduced microbial number to a safe level bu not completely eliminate all microbes are defined as sanitizers 30. The first microscope was invented b

Explanation / Answer

13. True.

14. False it's crystal violet

15. False. It's diploconic acid

16. True

17. True

18. True

19. Selective medium

20. Protein like keratin makes the surface hard and more resistant

21. Only clostridium produces spores

22. None of the above. Such organisms are called facultative anaerobes

23. Facultative anaerobe

24. None of the above they have very little of these three enzymes or none at all

25. It's a solid medium.

26. False. Bigger the circle better the antibiotic

27. True.

28. False. Sterilisation destroys spores too.

29. True

30. False.

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