Microbial Genetics
The word, used for the small solid supports onto which are spotted hundreds of thousands of tiny drops of DNA that can be used to screen gene expression, is

southern blot
DNA microarrays
northern blot
cloning library

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Microbial Genetics
Why Deinococcus radiodurans is able to survive massive exposure to radiation?

Because it has many copies of genes encoding DNA repair
Because it has unique DNA repair mechanisms
Because it produces a thick shell which acts as a shield from the radiation
Because its cellwall contains radioactive elements

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Microbial Genetics
Why the bacterium Treponema pallidum is difficult to culture?

Because it requires a great deal of water to reproduce
Because it requires extremely low temperature at which water freezes
Because it is unable to use carbohydrates as an energy source
Because it lacks the genes needed for TCA cycle and oxidative phosphorylation

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