Use the Following Information to Answer the Questions Below

question 10

Multiple Choice

Use the following information to answer the questions below.
Nucleotides can be radiolabeled before they are incorporated into newly forming DNA and can therefore be assayed to track their incorporation. In a set of experiments, a student-faculty research team used labeled T nucleotides and introduced these into the culture of dividing human cells at specific times.
-The research team used the setup to study the incorporation of labeled nucleotides into a culture of lymphocytes and found that the lymphocytes incorporated the labeled nucleotide at a significantly higher level after a pathogen was introduced into the culture. They concluded that

• A) the presence of the pathogen made the experiment too contaminated to trust the results.
• B) their tissue culture methods needed to be relearned.
• C) infection causes lymphocytes to divide more rapidly.
• D) infection causes cell cultures in general to reproduce more rapidly.
• E) infection causes lymphocyte cultures to skip some parts of the cell cycle.

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Definitions:

Stress-Related Illness

Health problems, either physical or psychological, that are influenced or caused by stress.

Financial Problems

Difficulties in managing money effectively, leading to situations such as debt, inability to meet expenses, or lack of savings.

Promotion

The act of raising someone to a higher position or rank, often accompanied by an increase in salary and responsibilities.

HPA Axis

The hypothalamic-pituitary-adrenal axis, a complex set of direct influences and feedback interactions among three endocrine glands that control reactions to stress and regulate many body processes.