Question

Bacteriophages are viruses that infect bacteria. In an experiment, bacteriophages were labeled with either radioactive phosphorus or radioactive sulfur. The labeled bacteriophages were incubated with bacteria for a brief amount of time and then removed. The infected bacteria cells were found to contain significant amounts of radioactive phosphorus but not radioactive sulfur.Based on the results of the experiment, which of the following types of molecules did the bacteriophages most likely inject into the bacteria cells? (A) Simple carbohydrate (B) Amino acid (C) DNA (D) Polypeptide

Answer 1

(C) DNA

Step-by-step explanation:

DNA molecules does not contain sulfur in its structure. Some aminoacid (methionine and cysteine) does, therefore, a lot of polypeptides does. Also, some carbohydrates can have sulfur groups linked to its molecules.