Bacteria Are Grown in a Medium Containing [¹⁵N]H₄Cl for a Number

question 60

Multiple Choice

Bacteria are grown in a medium containing [¹⁵N]H₄Cl for a number of generations so that all of the DNA is made of fully 'heavy' DNA. The bacteria are moved to a new medium and grown in [¹⁴N]H₄Cl so that all subsequent new DNA will be 'light.' After one generation time, what does the DNA look like?

• A)All of the DNA is made of two 'light' strands.
• B)All of the DNA is made of two 'heavy' strands.
• C)All of the DNA is made of one 'heavy' strand and one 'light' strand.
• D)Each strand is made of a mixture of 'heavy' and 'light' DNA, with each strand being between 75% and 100% 'light.'
• E)Half of the DNA is made of two 'light' strands and half is made of two 'heavy' strands.

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Definitions:

Collective Bargaining

is a negotiation process between employers and a group of employees aimed at reaching agreements to regulate working salaries, working conditions, benefits, and other aspects of workers' compensation and rights.

Union Members

Individuals who belong to a labor union, an organized group that represents workers in negotiations with employers regarding work conditions and wages.

Hostility Toward Unionization

Negative attitudes or actions by employers, management, or other groups against the formation, growth, or activities of labor unions.

Company Dominated Unions

Unions that are controlled or heavily influenced by employers, often criticized for not genuinely representing the interests of workers.