The portion of a gene that is transcribed but not translated is known as:

If there are $81$ million bases in the $RNA$ of a human cell,calculate the total number of introns present in $cDNA$.

Which mineral element is essential for the process of transcription?

During transcription,both strands of $DNA$ are not copied because:

Which of the following statements are correct?
$(i)$ From one molecule of $\text{DNA}$,several molecules of $\text{RNA}$ can be formed.
$(ii)$ The $\text{RNA}$ forming part is known as the translational unit.
$(iii)$ The promoter is located at the $5'$ upstream end.
$(iv)$ The promoter and terminator flank the structural gene in a transcription unit.

Select the incorrect option for transcription in prokaryotes.