In the Meselson-Stahl Experiment, Bacterial DNA Was Labeled Completely with Heavy

question 41

Multiple Choice

In the Meselson-Stahl experiment, bacterial DNA was labeled completely with heavy nitrogen (¹⁵N) and then grown in the presence of light nitrogen (¹⁴N) . When only mixed DNA was observed after ONE generation of growth in¹⁴N, what was the conclusion?

• A) DNA replication is semiconservative
• B) DNA replication is conservative
• C) DNA replication is dispersive
• D) DNA replication is either semiconservative or dispersive
• E) DNA replication is either semiconservative or conservative

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Definitions:

Existence Needs

Basic physical and material well-being necessities like food, shelter, and safety that individuals require.

Growth Needs

Psychological requirements that drive personal development, self-improvement, and the fulfillment of one's potential.

ERG Theory

A theory of human motivation developed by Clayton Alderfer that categorizes core needs into three groups: Existence, Relatedness, and Growth.

Satisfied Need

A requirement or desire that has been fulfilled, contributing to an individual's contentment or well-being.