Question

question 8 of 10
what technique did hershey and chase use to track proteins and dna from
viruses?

a. ultraviolet spectroscopy

b. radioactive labeling

c. paper chromatography

d. x - ray diffraction

Explanation:

Hershey and Chase's experiment aimed to determine if DNA or protein was the genetic material. They used radioactive labeling: sulfur - 35 (³⁵S) to label viral proteins (since proteins contain sulfur and DNA does not) and phosphorus - 32 (³²P) to label viral DNA (since DNA contains phosphorus and proteins have little to no phosphorus). Ultraviolet spectroscopy is used for analyzing light absorption, paper chromatography for separating mixtures, and X - ray diffraction for studying molecular structures (like in DNA's double - helix discovery by Watson and Crick, not for tracking in this experiment). So the correct technique is radioactive labeling.

Answer:

B. Radioactive labeling