Cell Cultivations
The archaebacterium Halobacterium, an extreme halophile, and Sulfolobus, a thermoacidophile, can be cultured in the presence of antibiotics such as streptomycin and chloramphenicol because

All of these
they contain ether-linked isoprenoids in their plasma membrane
they contain 80S, as opposed to 70S, ribosomes
they lack murein in their cell wall

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Cell Cultivations
Which of the following is the necessary step for cultivating the microorganisms?

Inoculating the microorganisms in the prepared medium
Preparing a culture medium for the growth of microorganisms
All of these
Sterilizing in order to eliminate all living microorganisms in vessel

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