A Geneticist Introduces a Transgene into Yeast Cells and Isolates

question 33

Multiple Choice

A geneticist introduces a transgene into yeast cells and isolates five independent cell lines in which the transgene has integrated into the yeast genome. In four of the lines, the transgene is expressed strongly, but in the fifth there is no expression at all. Which is a likely explanation for the lack of transgene expression in the fifth cell line?

• A)A transgene integrated into a heterochromatic region of the genome.
• B)A transgene integrated into a euchromatic region of the genome.
• C)The transgene was mutated during the process of integration into the host cell genome.
• D)The host cell lacks the enzymes necessary to express the transgene.
• E)A transgene integrated into a region of the genome characterized by high histone acetylation.

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Definitions:

Amps

A unit of electric current in the International System of Units (SI), short for amperes.

Volts

Volts are the unit of electric potential and electric potential difference in the International System of Units (SI), indicating the force that drives electric current between two points.

Parallel Circuit

In electricity, any circuit that has two or more paths for current flow.

Total Circuit Resistance

The sum of all resistive elements within an electrical circuit, affecting the overall current flow and energy consumption.