In which medium should viruses be cultured to | vedclass

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(C) The $DNA$ molecule contains a sugar-phosphate backbone,where phosphorus is a key component. Proteins,on the other hand,contain sulfur (in amino ac

Vedclass · Accepted Answer

Radioactive phosphorus

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(C) The $DNA$ molecule contains a sugar-phosphate backbone,where phosphorus is a key component. Proteins,on the other hand,contain sulfur (in amino acids like methionine and cysteine) but lack phosphorus. By culturing viruses in a medium containing radioactive phosphorus $(^{32}P)$,the virus incorporates this isotope into its $DNA$. Conversely,culturing viruses in a medium containing radioactive sulfur $(^{35}S)$ labels the viral proteins. Therefore,to obtain radioactive $DNA$,the virus must be cultured in a medium containing radioactive phosphorus.

In which medium should viruses be cultured to obtain radioactive $DNA$?

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