Suppose That Some Cells Are Grown in Culture in the Presence

question 55

Multiple Choice

Suppose that some cells are grown in culture in the presence of radioactive nucleotides for many generations so that both strands of every DNA molecule include radioactive nucleotides.The cells are then harvested and placed in new medium with nucleotides that are not radioactive so that newly synthesized DNA will not be radioactive.What proportion of DNA molecules will contain radioactivity after two rounds of replication?

• A)0
• B)1/8
• C)1/4
• D)1/3
• E)1/2

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Definitions:

Regulate Body Temperature

The physiological processes that maintain the body's temperature within a normal range, crucial for proper functioning and survival.

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A state of mental confusion or lack of orientation concerning time, place, or personal identity.