Replication was allowed to take place in the presence of radioactive deoxynucleotides precursors in $\rm {E. coli}$ that was a mutant for $\rm {DNA}$ ligase. Newly synthesised radioactive $\rm {DNA}$ was purified and strands were separated by denaturation. These were centrifuged using density gradient centrifugation. Which of the following would be a correct result
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Replication was allowed to take place in the presence of radioactive deoxynucleotides precursors in $\rm {E. coli}$ that was a mutant for $\rm {DNA}$ ligase. Newly synthesised radioactive $\rm {DNA}$ was purified and strands were separated by denaturation. These were centrifuged using density gradient centrifugation. Which of the following would be a correct result
$(d)$
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$A$ : Catalytic functions were assigned to $RNA$ molecule during evolution.
$R$ : The rate of mutation is quite fast in $RNA$
$A$ : Catalytic functions were assigned to $RNA$ molecule during evolution.
$R$ : The rate of mutation is quite fast in $RNA$
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