Questions
During Messelson and Stahl experiment, heavy DNA was distinguished from normal DNA by centrifugation in
a
SO2
b
15NH4Cl
c
14NH4Cl
d
CsCl gradient
detailed solution
Correct option is D
Meselson and Stahl subjected the DNA isolated from E.coli after certain period of incubation at the beginning in 15NH4ClA and later in 14NH4Cl to CsCl gradient centrifugation to suspend the heavy DNA at the bottom, lighter DNA at the upper level and hybrid DNA at the median position of centrifugeTalk to our academic expert!
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