$A$ : Operator gene is functional when it is not blocked by repressor.
$R$ : Regulator gene produces active protein only which acts on operon system in $E$.coli
Medium
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c Regulator gene produce its product. It is inducer which will bind with repressor
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Escherichia coli fully labelled with $15 \mathrm{~N}$ is allowed to grow in $14 \mathrm{~N}$ medium. The two strands of $DNA$ molecule of the first generation bacteria have
$A$ : Unknown $DNA$ after hybridization with $VNTR$ probe, the autoradiogram gives many bands of differing sizes in $DNA$ profiling.
$R$ : These bands represents $DNA$ fingerprint of organism
One strand of the given segment of $DNA$ codes for $mRNA$ having the sequence $AUC, GCG, UCA$ needed for synthesis of proteins. The strand by which $DNA$ molecule will be responsible for the above $mRNA$ sequence is