39. Mannitol salt agar (MSA) only allows the growth of halophiles (salt-loving m

Question

39. Mannitol salt agar (MSA) only allows the growth of halophiles (salt-loving microbe the halophiles, mannitol fermenters release acid that turns the pH indicator yellow; mannitol nonfermenters leave the medium red. Onto MSA you inoculate a halophilic mannitol fermenter a nonhalophilic mannitol fermenter, and a halophilic mannitol nonfermenter. Thus, the medium is acting as a· m A. Differential B. Enrichment C. Selective D. Selective and differential E. None of the above s). Among medium. 40. A given medium can be either selective or differential but not both. A. True B. False 41. Discuss in detail about four phases of microbial growth observed in a batch culture. 42. List 5 different types of extremophilic microorganisms and describe them.

Explanation / Answer

39. selective and differential media

select only halophiles, differentiate between fermenter and nonfermenter

40. false.....

reason as in question 39.

it can be both.

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