Home › NEET UG › Biology › Molecular Basis of Inheritance ›  In the Hershey-Chase experiment (1952), which radioactive isotope labelled DNA, and which labelled protein?
A³²P → DNA; ³⁵S → protein
B³H → DNA; ¹⁴C → protein
CBoth DNA and protein labelled with ³²P
D³⁵S → DNA; ³²P → protein
Answer & Solution
Correct answer: A. ³²P → DNA; ³⁵S → protein
**³²P labels DNA** (DNA contains phosphorus, protein does not). **³⁵S labels protein** (proteins contain sulphur — cysteine, methionine — but DNA does not). Result: only ³²P entered the bacteria → **DNA is the genetic material**.
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