The eukaryotic genome differs from the prokaryotic genome because

The one-gene-one-enzyme relationship was first established in.....

Read the following statements carefully and choose the correct statements.
$(A)$ In a transcription unit,the promoter is located at the $5'$ end of the coding strand.
$(B)$ The single strand $DNA$ having the polarity $5' \rightarrow 3'$ is the template strand.
$(C)$ $RNA$ polymerase binds to the operator during transcription.
$(D)$ Single base $DNA$ differences occurring in humans are called Single Nucleotide Polymorphisms $(SNPs)$.

What is central dogma and describe the packing of $DNA$ helix?

Statement-$I$: The split gene arrangements represent probably an ancient feature of the genome.
Statement-$II$: Introns or intervening sequences do not appear in mature or processed $\text{RNA}$.

Genetic mapping of bacteriophage $\phi X174$ has been done by