The Work of Meselson and Stahl

question 40

Multiple Choice

The work of Meselson and Stahl:

• A) Showed that DNA replication semiconservative, which means that the parental double helix is conserved.
• B) Used the radioisotope ³H-thymidine in conjunction with centrifugation to separate DNA on the basis of size
• C) Showed that the DNA, after one round of replication, was of intermediate density thereby showing that the DNA molecules contained one parent strand and one new strand.
• D) All of these
• E) None of these

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Definitions:

Backup

The process of making a copy of data stored on a computer or server to protect against data loss.

Storage Medium

Any material or device that can be used to store data, such as a hard drive, solid-state drive, or optical disc.

Head Crash

A hardware malfunction in a hard disk drive when the read-write head comes into contact with the spinning disk surface, often resulting in data loss.

Software

Programs and operating information used by a computer to perform specific tasks.