In the Hershey and Chase Experiment, Phage-Infected Bacteria and Viral

question 19

Multiple Choice

In the Hershey and Chase experiment, phage-infected bacteria and viral progeny were radioactive following bacterial infection with³²P-labeled viruses. Why?

• A) Bacteria had incorporated radioactive proteins into their DNA.
• B) Phage DNA labeled with³²P had entered the bacteria and appeared in progeny phages.
• C) Viral progeny had used the³²P to build new viral proteins.
• D) Bacteria had incorporated radioactive proteins into their cell membranes.
• E)³²P was left outside the cell during viral infection.

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Definitions:

Mate for Copulation

The selection of a partner for the purpose of sexual reproduction.

Aggression

A range of behaviors that can be physical or verbal, intended to harm or intimidate others.

Reinforced

Strengthened or emphasized, often in the context of behavior strengthened by a consequence in psychological terms.

Classical Conditioning

An instructional process in which two stimuli are regularly paired together; the response, which is at first produced by the second stimulus, is eventually produced by the first stimulus on its own.