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  4. E. coli bacteria grew in 15NH4Cl medium for several generations are allowed to grow in 14NH4Cl medium. After 2 generations, the bacteria are isolated from the medium and DNA of bacteria centrifuged in CsCI. The result of the density gradient of DNA is .

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Q. E. coli bacteria grew in 15NH4Cl medium for several generations are allowed to grow in 14$NH_4Cl$ medium. After 2 generations, the bacteria are isolated from the medium and DNA of bacteria centrifuged in CsCI. The result of the density gradient of DNA is .

KCETKCET 2016Molecular Basis of Inheritance

Solution:

Correct answer is (d) both hybrid and light DNA