An Organic Solvent Widely Used in Industrial Processes, 1,1,1-Trichloroethane (TCA)

question 25

Multiple Choice

An organic solvent widely used in industrial processes, 1,1,1-trichloroethane (TCA) , is a major environmental pollutant affecting human health and damaging the ozone layer. Recently, researchers isolated the first bacteria able to degrade TCA. They found that the bacteria use hydrogen as an electron donor, TCA as an electron acceptor, and acetate as a carbon source. Based on the preceding information, deduce the method used to isolate these bacteria.

• A) Gram staining
• B) enrichment culture
• C) direct sequencing
• D) seeding

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Definitions:

Outermost Zone

The furthest layer or area, often used in context with geographical locations or structures.

Earth's Mantle

is the layer of the Earth located between the crust and the outer core, composed of silicate rocks that are rich in magnesium and iron, and participates in tectonic processes.

Inorganic Compound

A compound that is not based on hydrocarbon chains or rings but instead consists of elements other than carbon and hydrogen, often including metals.

Crystalline Structure

The highly ordered arrangement of atoms or molecules within a crystal, giving it characteristic physical properties.