E Coli Cells Grown on 15N Medium Are Transferred to 14N

question 48

Multiple Choice

E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA replication) . DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment?

• A) one high-density and one low-density band
• B) one intermediate-density band
• C) one high-density and one intermediate-density band
• D) one low-density and one intermediate-density band
• E) one low-density band

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Definitions:

Internal Control

Mechanisms or procedures implemented by a company to ensure the integrity of financial and accounting information, promote accountability, and prevent fraud.

Hot Stove Rule

A principle in management and discipline that suggests consequences should be immediate, consistent, impersonal, and close to the action of misconduct, akin to touching a hot stove.

Progressive Discipline

The process of tying reprimands to the severity and frequency of misbehaviour.