Use the Figure to Answer the Following Question

question 48

Multiple Choice

Use the figure to answer the following question. A space probe returns with a culture of a microorganism found on a distant planet. Analysis shows that it is a carbon-based life-form that has DNA. You grow the cells in "heavy" (radioactive) nitrogen (15N) for several generations and then transfer them to 14N medium. Which pattern in the figure would you expect if the DNA was replicated in a conservative manner?

• A) A
• B) B
• C) C
• D) D

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Definitions:

Hepatitis

A viral disease affecting the liver; several types of the virus can be sexually transmitted.

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A medical condition characterized by the yellowing of the skin and the whites of the eyes caused by high bilirubin levels.

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A skin condition characterized by a raised and often red area that can be itchy or irritating.

Genital Herpes

A sexually transmitted infection caused by the herpes simplex virus, resulting in blisters and sores on the genital area.