The Meselson-Stahl Experiment Used DNA Containing ¹⁴N and ¹⁵N to Show

question 24

Multiple Choice

The Meselson-Stahl experiment used DNA containing ¹⁴N and ¹⁵N to show that DNA replication is semi-conservative. If replication had been conservative (i.e., one double helix formed of 'old' DNA, and one completely new double helix) , what would have been the expected outcome of the experiment after one round of replication?

• A) Half the DNA would have ¹⁴N density and half would have ¹⁵N density.
• B) All the DNA would have¹⁴N density
• C) All the DNA would have¹⁵N density
• D) All the DNA would have density intermediate between¹⁴N and ¹⁵N

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Definitions:

Social Control

Mechanisms, strategies, and institutions designed to regulate individual and group behavior in an attempt to conform to norms and rules.

Threatens

To express an intention to inflict harm or punishment on someone or something.

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The process by which businesses or other organizations develop international influence or start operating on an international scale, affecting economic, social, and cultural fields.

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The process by which human conditions and behaviors are defined and treated as medical issues, often involving the use of medication or medical interventions.