21. During which growth phase will gram-positive bacteria be most susceptible to

Question

21. During which growth phase will gram-positive bacteria be most susceptible to penicillin? a) Lag phase b) Log Phase c) Death phase d) Stationary phase e) The culture is equally susceptible during all phases Which of the following is the best definition of gencration time? a) The length of time it takes for lag phase b) The length of time it takes for a cell to divide c) The minimum rate of doubling d) the duration of log phase e) The time it takes for nuclear division 22. All of the following are direct methods to measure microbial growth except: a) Direct microscopic coúnt b) Standard plate coupt c) Filtration d) Metabolic activity e MPN 23. Which group of microorganisms is most likely to spoil a fresh water trout preserved with salt? a) Psychropiles b) Halophiles c) Anaerobes d) Thermophiles e) None of the above 24. Which of the following is an example of a metabolic activity that could be used to measure microbial growth? a) Standard plate dount b) Glucose consumption 25. c) Direct microscopic cojint d) Turbidity MP

Explanation / Answer

21. B...log phase

22. B...Time taken by a cell to divide (to double)

23. D...Metabolic activity(indiret method)

24. B...Halophiles

25. B...Glucose consumption

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