Why Was It Necessary for the Lab to Inoculate a Sample

question 12

Multiple Choice

Why was it necessary for the lab to inoculate a sample of the incubated tetrathionate broth onto a medium selective for Salmonella?

• A) To confirm that the bacteria in the broth is Salmonella and not another bacterial species.
• B) To confirm that the bacteria in the broth is E. coli and not another bacterial species.
• C) To check whether the Salmonella has the ability to form endospores.
• D) To confirm that Salmonella is a bacterium and not a virus or protozoan.
• E) To confirm that Salmonella is a facultative anaerobe and not an obligate acidophile.

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Definitions:

Atmosphere

The layer of gases surrounding Earth, protecting it from extreme temperatures and harmful space energies.

Gaseous Layer

A stratum of the atmosphere composed of gases, such as the ozone layer, which provides protection from the sun's harmful ultraviolet radiation.

Planet

A celestial body orbiting a star or stellar remnant, with sufficient mass for self-gravity and a clear path in its orbit.

Insect Family

A classification level within the scientific taxonomy of insects, grouping together species that share common characteristics and evolutionary ancestors.